Flange Joint Bolt Tightening Procedure

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PHEONWJ Ltd. Flange Joint Bolt Tightening Procedure

PHEONWJ-G-PRC-0016 Rev. 0. Page 2 of 37

Revision Log Register

Document Number : PHE-ONWJ-G-PRC-0016

Document Title : Flange Joint Bolt Tightening Procedure

Revision : 0

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Table of Contents

CONTENTS ..................................................................................................................... 3

1. SCOPE ................................................................................................................. 5

2. REFERENCE ........................................................................................................ 5

3. SAFETY ............................................................................................................... 5

4. GENERAL GUIDELINES ..................................................................................... 6

4.1. Flange System ........................................................................................................ 6

4.2. Flange Elements ..................................................................................................... 6

5. METHOD .............................................................................................................. 6

5.1. Hand Wrench / Manual Torque Wrench . ................................................................ 6

5.2. Hydraulic Torque Wrench / Bolt Tension ................................................................. 7

6. CALIBRATION ..................................................................................................... 7

7. PERSONNEL ....................................................................................................... 7

8. TOOL FITTING OPERATION ............................................................................... 7

8.1. Manual Torque Wrench ........................................................................................... 7

8.2. Hydraulic Torque Wrench ........................................................................................ 8

8.3. Hydraulic Bolt Tension ...........................................................................................10

9. ELONGATION MEASUREMENT ....................................................................... 11

10. FLANGE FIT-UP AND BOLT PREPARATION .............................................. 13

10.1. Preparation for Bolt-up .......................................................................................13

10.2. Pre-Assembly of Flanges ...................................................................................14

11. FLANGE BOLT TIGHTENING SEQUENCE ................................................... 15

11.1. Torque Tightening Dos & Donts ........................................................................17

11.2. Bolt Tensioning Dos and Donts ......................................................................18

Figure 5 ........................................................................................................................ 19

Figure 6 ........................................................................................................................ 20

Figure 7 Typical Criss-Cross Bolting Tightening Sequence for bolts 24 & bolts

28 .................................................................................................................................. 21

Figure 8 Typical Criss-Cross Bolt Tightening for bolts 32 .................................. 22

Figure 9 Typical Criss-Cross Bolt Tightening Sequence for bolt 36 ................. 23

Figure 10 Typical Criss-Cross Bolt Tightening Sequence for bolts 40 ............. 24

Figure 11 Typical Criss-Cross Bolt Tightening Sequence for bolts 44 .............. 25

Figure 12 Typical Criss-Cross Bolt Tightening Sequence for bolts 48 .............. 26

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Figure 13 Typical Criss-Cross Bolt Tightening Sequence for bolts 52 ............. 27

Appendix A .................................................................................................................. 28

Appendix B .................................................................................................................. 29

Appendix C .................................................................................................................. 30

Appendix D .................................................................................................................. 31

Appendix E ................................................................................................................... 32

Appendix F ................................................................................................................... 37

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1. SCOPE

This Procedure covers flange joint tightening by means of a hydraulic torque wrench, and using

manual torque wrench (click or break back torque wrench), Torque Wrench and Bolt Tension for

Pressure vessel and Piping components for new construction and existing installations

pressurized equipment (up to 2500#).

2. REFERENCE

ANSI / ASME B16.5 : Pipe Flanges and Flanged Fittings

ASME-PCC-1-2000 : Guidelines for Pressure Boundary Bolt Flange Joint

Assembly

ANSI/ASME Sect. VIII : Rule for Construction of Pressure Vessel

ANSI/ASME B31.3 : Chemical Plant and Petroleum Piping

ANSI/ASME B31.4 : Pipeline Transportation System for Hydrocarbon and

Other Liquid

ANSI/ASME B31.8 : Gas Transmission and Distribution Piping System

PHE ONJW-G-PRC-0148 : Joint Integrity Testing for Pipework and Equipment

3. SAFETY

Hydraulic power tools enable the user to more easily accomplish bolting tasks with increased

force, accuracy and efficiency.

Due to the nature of the tools, with large forces generated, and for hydraulic torque equipment

from high-pressure fluid/air and electricity strict safety issues are followed through the tools

proper design and documentation. However the user must accept the primary responsibility for

safety when using torque tightening tools by carrying out site related risk assessments, and

reading, understanding and complying with all operating instructions prior to and during

operation.

This procedure is aimed to give proper instruction for use and care of hydraulic & manual tools

and to play a major role in preventing accidents and increasing safety.

Only technicians trained and competent in the use of bolt tightening equipment, who have

completed a recognized competence assessment programmed, shall carry out the controlled

breakout and tightening of bolted joints.

Technician shall be fully conversant with the safe use of the tools and their operating procedures

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4. GENERAL GUIDELINES

4.1. Flange System

Structurally, the bolts in a flange system can be considered as heavy springs clamping the

rings together in order to maintain a gasket seal. The design for bolted flange connections

considers the proportioning of the bolting, ie. the number and size of bolts, as one of the

most important factors. In assembling flanged joints, the gasket shall be uniformly

compressed to the proper design loading. Special care shall be used in assembling

flanged joints in which flanges have widely differing mechanical properties.

The combination of temperatures and thermal expansion coefficients of the flanges and

bolts during service may provide a leaking joint as a result of bolts loosening or creep.

4.2. Flange Elements

The three elements of the system, i.e. gasket, bolting and flange rings, are equally

important as any one can cause a failure i.e. leakage (for example):

a. Choose the wrong gasket and you may never be able to get a tight joint.

b. Over strength bolts on an incorrect tightening procedure could lead to excessive

flange rotation and thus leakage. The under strength bolts can easily be yielded

without seating the gasket.

c. An incorrectly proportioned flange ring can give excessive rotation which evens a

change of gasket may not be able to accommodate.

5. METHOD

In general, the selection of the torquing device used to assemble a flanged joint as well as the

method of control. The methods depend either on using torque to produce the bolt end load, or a

stretching technique. The accuracy of the torquing techniques depend largely upon the

operator's experience and are more susceptible to the quality of the stud and nut surfaces, and

the degree of lubrication. They must be considered a labour saving device the area not enters

reliable as mean of achieving even bolt tension. However, evenness of bolt load can be

considered to be at least as good as that achieved with a spanner and hammer. Therefore only

an experienced and qualified crew should be employed.

5.1. Hand Wrench / Manual Torque Wrench .

Manual torque wrench which is normally rated to a maximum output of 300 Nm and has a

square drive. The wrench contains a mechanism that clicks when the required torque

value is achieved.

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The manual method bolt tightening using Manual torque wrench or torque wrench will be

applied for bolt nominal diameter below 25mm (1 Inch).

5.2. Hydraulic Torque Wrench / Bolt Tension

The Hydraulic torque wrench or Bolt tension equipment will be used for bolt with nominal

diameter 25 mm (1 Inch) and over.

Hydraulic torque wrench with interchangeable square drive and hexagon cassettes which

are normally powered by an air or electric operated pump unit up to a maximum operating

pressure of 10000 psi.

For flange connections with bolting of nominal diameter 25 mm (1 inch) and over,

tightening shall be using Torque Wrench or Bolt Tension. For sequence bolt tightening

shall have sufficient clearance and access to allow the use of hydraulic torque wrench

equipment.

6. CALIBRATION

The Torque wrench must be in good working order and have a calibration certificate valid for the

date of the task. If the wrench has no valid certificate, it shall be re-calibrated or changed. If the

wrench is dropped or knocked during process then verify the calibration before proceeding, and

for hydraulic Torque Wrenches The pump must have a calibration certificate valid for the date of

the task. If the pump has no valid certificate, it shall be re-calibrated or changed.

7. PERSONNEL

Only technicians trained and competent in the use of bolt tightening equipment, who have

completed a recognized competence assessment programmed, shall carry out the controlled

breakout and tightening of bolted joints.

8. TOOL FITTING OPERATION

8.1. Manual Torque Wrench

1. Square drive tools only: check that the correct size impact socket has been selected

and that it has a retaining ring and pin.

2. Check that the square drive is in the correct position for tightening operations.

3. Attach the impact socket and secure it with the retaining ring and pin.

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4. Spigot drive tools only: check that the correct size of open end or ring attachment has

been selected for the relevant wrench and that it is fitted correctly.

5. Adjust torque setting for the wrench by turning the handle or nut at the end of the

wrench clockwise to increase the spring tension, which will increase the torque value.

Turning the handle counter clockwise will reduce the spring tension, which will reduce

the torque output.

6. The torque value selected will be visible either on a graduated scale inside a window of

the handle on smaller click type wrenches or a graduated scale on the end of larger

break back wrenches.

7. Fit the wrench via the socket or spigot fitting to the application.

8. Position feet apart with one foot in front of the other.

9. Prepare body for sudden movement in case of ratchet or wrench slippage or back nut

turning.

10. When using larger manual torque wrenches, assistance may be required to pull the

wrench safely. If assistance is not available or the activity cannot be completed safely

then the hydraulic torque tightening method should be used.

11. Pull the wrench clockwise towards the body using both hands, applying a steady force

and constant load.

12. Continue tightening operations by pulling the wrench clockwise until maximum travel or

the torque value is achieved by activating the click or linkage mechanism.

13. Repeat steps 7 to 12 for all bolts/nut to be tightened.

14. After use, reset the torque setting to zero prior to storing the wrench, this helps to

maintain the calibration of the wrench.

Note:

o Do not activate the wrench by pulling erratically

o Backing spanners must be secured to prevent accidental release by being tied off or

other methods. Backing spanners also introduce pinch points.

o When using larger manual torque wrenches assistance may be required to pull the

wrench safely.

8.2. Hydraulic Torque Wrench

1. Ensure that the power console is full of hydraulic oil and, if an air power console is

being used, that the air lubricator has sufficient oil in it

2. Make sure that all air and hydraulic couplings are clean and free from dirt.

3. Square drive tools only: check that the correct size impact socket has been selected

and that it has a retaining ring and pin.

4. Check that the square drive is in the correct position for tightening operations.

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5.Attach the impact socket and secure it with the retaining O ring and pin.

6. Position the reaction arm for the best angle and safe operation. Then engage the

retaining device.

7. Hex head tools only: check that the correct size hex head has been selected for the

relevant power head and that it is fitted correctly.

8. With the tool removed from the flange and safely positioned on the ground, connect the

hydraulic hoses to the tool and the power console via the quick release fittings

ensuring that all locking collars/thumbscrews are fully tightened.

9. Connect the pump to an air supply with whip checks and pins at all connections. Switch

on air supply and check system for leaks.

10. The torque wrench is operated via a remote control pendant which is connected to the

pump unit. To extend the actuator depress the actuator extend control button until the

actuator makes a complete stroke then release to allow the actuator to return.

11. Ensure that the torque tool is removed from the flange. Then proceed to set the pump

to the required pressure for tightening by turning the torque control valve clockwise to

increase pressure or counter clockwise to decrease pressure while actuating the tool

until the required pressure is displayed on the pump calibrated pressure gauge.

Note:

o Always remove the tool from the flange and place on a surface where reaction will not be

possible when setting/altering the pump pressure or adjusting reaction points!

o For two-man operation, ensure the communication procedure is clear and understood before

proceeding.

12. Fit the tool onto the bolt via the nut, ensuring that correct and safe reaction is achieved.

Note:

Pinch points are present around all reaction areas and in tight spaces. Hands and fingers must be kept clear

from pinch points at all times.

13. To tighten the nut, depress the actuator extend control button until the actuator makes

a complete stroke then release to allow the actuator to return. Continue to stroke the

actuator for further strokes until the required torque load and pump pressure is

achieved and the nut is tight.

Note:

Figure 1 Torque Wrench Equipment

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o If the back nut begins to move while tightening a backing spanner must be fitted to

the nut reacting off the next adjacent nut to prevent turning. Backing spanners must

be secured to prevent accidental release by being tied off or other methods.

Backing spanners also introduce pinch points.

8.3. Hydraulic Bolt Tension

1. All flanges and bolts shall be prepared and preassemble prior to tensioning as specified

as section 10.

2. The tension device must engage the threads on the stud bolt for a length equal to a

minimum of 80% of the stud diameter.

3. On the application where several bolts are tensioned simultaneously, all tensioning

equipment shall be connected to the same hydraulic pump.

4. When bolts need to be stressed near their yield point, torquing methods shall be

considered since tensioning requires overtensioning to compensate for short term

relaxation.

5. Stud bolt tensioner shall be used simultaneously in sets of four in the order indicated in

figure 2 through figure 13,(e.g tensioners shall be attached to stud bolts 1 thru 4,

tensioner, then moved to stud bolts 5 thru 8,etc) Sets of two may be used only on

flanges with fours bolts.

6. Bolt tensioning often requires two different pressure settings. The first pass is generally

performed at a pressure designed to overtension the bolts in order to account for bolt

relaxation. Subsequent passes are conducted at a lower pressure, calculated to produce

the required minimum residual bolt stress when the joint is tight. Additional passes

should be performed at this lower pressure until the nuts remain tight when this pressure

is applied to the tensioning equipment.

8.3.1. Tensioner Attachment (Vertical)

a. Center the stud bolt tensioner on the stud bolt. Lower the tensioner over the

stud and nut assembly. Align the nut socket (on tensioner) with assembly

nut by turning the drive gear. Lower the tensioner until the base rests

squarely on the flange surface.

b. Thread the puller bar onto the stud bolt until it bottoms out on the

tensioner piston

c. Back the puller bar off one quarter (1/4) turn.

d. Stud bolt tensioners shall not be pressurized until attachment procedure is

complete for tensioners and extensiometer

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8.3.2. Tensioner Attachment (Horizontal)

a. Align the tensioner axially with the stud and nut assembly to prevent side

stressing of the puller bar and the stud. Align the nut socket (on tensioner)

with the assembly nut by turning the drive gear. Place the tensioner on the

stud and nut assembly until the base rests squarely on the flange surface.

b. Support weight of the tensioner by hand or slings. Do not force wedges for

support.

c.Thread the puller bar onto the stud bolt until it bottoms out on the

tensioner piston.

d. Back the puller bar off one quarter (1/4) turn.

e. Stud bolt tensioners shall not be pressurized until the attachment procedure

is complete for both tensioners and the extensiometer

9. ELONGATION MEASUREMENT

The amount of elongation of the stud required to achieve the desired tension in the stud is

determined by using of the following formula:

D = LE / E

Where : D= Elongation of the stud in inches

= Target Bolt stress

LE= Effective bolt length in inches

E = Modulus of Elasticity

Figure 2 Bolt Tension Equipment

HorizontalVertical

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1. Determine the lengths L and H as shown in Figure 3

2. Calculate the effective bolt length, LE

LE = L + (Ft x H)

Where : Ft =2/3 when new bolts are used

And Ft = 1 when old bolts are reused

3. Elongation is determined by measuring the length of the stud before and againt

after the tensile load is applied to the studs.

4. A log of the measurements taken for the initial lengths and any subsequent

elongations shall be recorded.

5. For the second to last torquing / tensioning setting , the elongations shall be

checked to determine if the final torque or tension setting is appropriate.

Adjustments to the final setting may required depending on the elongation

measured.

6. The acceptance criteria for final elongation measurements shall be 15% of the

targeted elongation, unless otherwise specified by company. If the average

measured value is close to the targeted value but the scatter is not within the

15% limit, additional passes are required at the same load setting.

7. The project engineer / project coordinator and inspector shall sign of on the report

flange joint records to show acceptance of the joint.

Figure 3 Bolt Tension Equipment

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10. FLANGE FIT-UP AND BOLT PREPARATION

10.1. Preparation for Bolt-up

1. Flange faces shall be thoroughly cleaned using a wire or power brush. All rust and

burrs shall be completely removed. Particular attention shall be paid to the seating

surfaces for metal gaskets such as the grooves in ring joint flanges.

2. Gasket surfaces on flange faces shall be thoroughly inspected. Any scratches or

indications extending 50% of the width of the seating surface shall be removed by

methods approved by theOwners Engineer. Nubbins on flange faces shall be

inspected and repaired, if necessary. The Inspector or designated representative shall

accept or reject all flange surfaces in accordance with the above criteria

3. Bolts shall be checked for proper size, length, conformance to specifications,

cleanliness, and absence of burrs. Bolting materials shall be in accordance with

company specification. When using bolts that have been in service, all thread surfaces

shall be cleaned using a wire or power brush. Bolts that are bent or have damaged

threads shall not be re-used

4. The surface of the flanges where contact is made with the nuts shall be wire or power

brushed.

5. Gaskets shall be checked for size, conformance to specification, and cleanliness. Metal

gaskets shall have grease, rust, and burrs completely removed. All gaskets shall be

fitted against each flange gasket seating surface to check alignment with the surface.

6. Spiral wound, metal jacketed or sheet gaskets shall not be reused. Ring Joint type

gaskets shall not be reused without the Owners Engineers approval.

7. Thread lubricants shall be suitable for the operating temperature of the system and

shall require the approval of the Owners Engineer. Thread lubricants for bolting shall

not contain lead. Thread lubricants for austenitic bolting shall not contain chlorides.

Unless otherwise specified by the Owners Engineer, one of the anti-seize thread

compounds in shall be used.

8. Proper thread lubrication shall be applied to every friction surface of the bolt assembly.

This includes the threads, and all bearing surfaces of the nut, washer and bolt head.

Lubrication on the bolt threads shall be applied prior to putting the nuts on.

9. When ultrasonic elongation control is required, bolting shall have smooth and parallel

ends to assure accurate measurements. In some cases, particularly small diameter

bolting, stud bolt ends will need to be shop machined

10. Never draw up tight on one or two bolt only. This will cause local gasket crushing or

pinching, which will result in leak. Always tighten up gradually, using the criss-cross

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pattern. After each round of tightening, the alignment may be checked by measuring

the distance between the flange faces.

10.2. Pre-Assembly of Flanges

1. Only technicians trained and competent in the use of bolt tightening equipment, who

have completed a recognized competence assessment program, shall carry out the

controlled breakout and tightening of bolted joints

2. Two bolts shall be installed diametrically opposite each other, and one bolt half way

between the previously installed bolts (for flanged joints in horizontal lines, on the

underside) for retaining the gasket (e.g. bolts 2, 3 and 4 in Table 1). The nuts shall

then be engaged.

3. The gasket shall be inserted, and centered between the flanges. Nuts shall be hand

tightened to hold the gasket in place. When flanged joints are in horizontal lines,

gaskets without centering devices such as ring joint gaskets shall be lowered to the

bolts for retention and then raised into position.

4.Specially for Installation of Gasket for flange over 24, ensure the centered Gasket

between the flanges raise face area shall be match.

5. Gaskets shall not be held in place with tape during flange alignment. A heavy grease or

gasket cement can be used, if necessary.

6. Alignment tolerances for flange faces prior to bolt-up shall be in accordance with

company specification. If these tolerances are not met, the Engineer or Inspector shall

be consulted to determine the remedial actions required.

7. Check flange alignment, pipeworks flanges are often limited to a maximum out-of

alignment of 0.75mm (0.03in).

8. The use of graphite tape or any other foreign material to hide gasket seating surface

imperfections is strictly prohibited.

9. All flanged joints shall be snuggled up squarely so that the entire flange face bears

uniformly on the gasket. Four pointing and eight pointing procedures are acceptable for

the initial alignment of joints, provided torque values less than 1/3rd(a third) of the final

torque value.

10. Measurements of the gap between flanges shall be taken around the circumference to

assure that the flanges are being brought evenly together.

11. Heavy covers of horizontal equipment shall be provided with external supports and

guides which shall be maintained until the joint is tightened.

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12. After the initial alignment has been completed, the remaining bolts and nuts shall be

installed and hand tightened. All bolts shall extend completely through their nuts. At

least three complete threads shall be visible from the backside of each nut. With the

approval of Engineer, the three complete thread requirements can be waived but the

bolt must be at least flush with the back side of the nut assuring full thread

engagement. When tensioning will be used for final tightening of the joint, at least one

bolt diameter of thread length shall extend through the nut on the side that the bolt

tension will be used.

Note:

o Never draw up tight on one or two bolts only. This will cause local gasket crushing

or pinching, which will result in leaks. Always tighten up gradually, using the "criss-

cross" pattern. After each round of tightening, the alignment may be checked by

measuring the distance between the flange faces.

11. FLANGE BOLT TIGHTENING SEQUENCE

1. Confirm that Joint Integrity Certificate JI1 has been prepared for the job

2. Hand tighten the nuts first, ensuring that the correct face of the nut will seat squarely

onto the flange surface

3. Measure the flange gap at a minimum of four points around the flange (larger flanges

should be at eight points)

4. The bolt tightening sequence should begin at the point of the largest gap!

5. Mark the correct tightening sequence on the studs in a clockwise direction with chalk as

per diagram (Reference ASME-PCC-1-2000).

Table No. 1 Criss-Cross Tightening Sequence Examples:

No

Number of

Bolt Flange

Criss-Cross Tightening Sequence Procedure

1 4 1-3-2-4

2 8 1-5-3-7-2-6-4-8

3 12 1-7-4-10-2-8-5-11-3-9-6-12

4 16 1-9-5-13-3-11-7-15-2-10-6-14-4-12-8-16

5 20 1-11-6-16-3-13-8-18-5-15-10-20-2-12-7-17-4-14-9-19

6 24 1-13-7-19-4-16-10-22-2-14-8-20-5-17-11-23-3-15-9-21-6-18-12-24

7 28

1-15-8-22-4-18-11-25-6-20-13-27-2-16-9-23-5-19-12-26-7-21-14-

28-3-17-10-24

8 32

1-17-9-25-5-21-13-29-3-19-11-27-7-23-15-31-2-18-10-26-6-22-14-

30-4-20-12-28- 8-24-16-32

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No

Number of

Bolt Flange

Criss-Cross Tightening Sequence Procedure

9 36

1-29-13-5-25-17-9-33-21-3-31-15-7-27-19-11-35-23-2-30-14-6-26-

18-10-34-22-4-32-16-8-28-20-12-36-24

10 40

1-17-33-9-25-5-21-13-37-29-3-19-35-11-27-7-23-15-39-31-2-18-

34-10-26-6-22-14-38-30-4-20-36-12-28-8-24-16-40-32

11 44

1-29-13-37-5-21-25-9-33-17-41-3-31-15-39-7-23-27-11-35-19-43-

2-30-14-38-6-22-26-10-34-18-42-4-32-16-40-8-24-28-12-36-20-44

12 48

1-25-41-9-17-33-5-29-45-13-21-37-3-27-43-11-19-35-7-31-47-15-

23-39-2-26-42-10-18-34-6-30-46-14-22-38-4-28-44-12-20-36-8-32-

48-16-24-40

13 52

1-21-37-13-29-45-5-9-25-41-17-33-49-3-23-39-15-31-47-7-11-27-

43-19-35-51-2-22-38-14-30-46-6-10-26-42-18-34-50-4-24-40-16-

32-48-8-12-28-44-20-36-52

Note:

o Correct numbering of bolts should result in all odd numbered bolts around one

side of the flange and all even numbered bolts around the other side.

6. Second tightening stage should be limited to a maximum of 60% of the final torque

setting.

7. Third tightening stage should be carried out at the 100% torque setting.

8. On the Fourth and Final tightening stage, change from criss-cross tightening to adjacent

bolt-to-bolt tightening clockwise using the 100% torque setting and chase around flange

until nuts finally stop rotating.

Note:

o First, second and third stages should be tightened using the criss-cross tightening

sequence and the fourth stage should be tightened using the adjacent clockwise bolt to

bolt sequence as shown in the diagrams above

9. Using a small hammer tap test each bolt to check the sound of the bolt rings true, dull or

vibrating bolts should be retightened to the correct value.

10. Ensure that the work area is left in a safe and tidy condition and that the Permit to Work

has been signed off.

11. Record all tightening information on the Joint Integrity Certificate JI1 part A.

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Marked Up 8 Bolt Flange 1st, 2nd, & 3rd Stage 4th & Final Stage

Criss Cross Sequence Adjacent Bolt Sequence

11.1. Torque Tightening Dos & Donts

a. Ensure that you are fully conversant with the safe use of the tools and their operating

procedures.

b. Check that the torque values required are applicable to the tools and bolt

lubricant/coating being used and to the flanges, gasket and bolt material being

tightened

c. Number the studs as an aid for applying the correct criss-cross tightening sequence.

d. Make sure that the full thread engagement of the nut on the bolt has been

achieved

e. Hand-tighten the nuts first, ensuring that the correct face of the nut will seat squarely

onto the flange surface.

f. Ensure that the manual torque wrench being used is adequately engaged before

pulling.

g. Wear suitable PPE as stated within the Permit to Work.

h. Ensure that the backing spanner, if being used, is correctly engaged and secured.

i. Ensure that there is sufficient room around the joint being tightened to pull the wrench

safely.

j. Reset manual torque wrenches to zero prior to storage.

k. Always remove the tool from the clamp connector and place on a surface where

reaction will not be possible when setting or altering the pump pressure!

2.Donts

a. Never tighten damaged or corroded bolts.

Figure 4 Criss-Cross Sequence

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b. Do not draw the joint up tight on one or two bolts, as this will cause local gasket

crushing or pinching of the gasket.

c. Do not over tighten bolts; take particular care with small bolts, i.e. less than 1

diameter.

d. Never pull the manual torque wrench any further once the click or linkage has

activated.

e. Never use a wrench that has been dropped or knocked without checking the

calibration.

f. Never pressurize unconnected hydraulic couplings.

g. Never stand in line with the bolt axis when tools are pressurized.

h. Never hold hydraulic wrenches at their pinch/reaction points when energizing.

i. Do not draw the flange up tight on one or two bolts, as this will cause local gasket

crushing or pinching of the gasket

11.2. Bolt Tensioning Dos and Donts

1. Dos

a. Ensure that you are fully conversant with the safe use of the tools and their operating

procedures.

b. Check that the pressures stated are applicable for the tools being used and for the

flange being tightened.

c. Make sure that the full thread engagement of puller has been achieved.

d. Hand-tighten the nuts first, ensuring that the correct face of the nut will seat squarely

onto the flange surface.

e. Wear suitable PPE as stated within the Permit to Work.

2.Donts

a. Never pressurize unconnected hydraulic couplings.

b. Never tension damaged or corroded bolts.

c. Never stand in line with the bolt axis.

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Figure 5 Typical Criss-Cross Bolt Tightening Sequence for 4 bolts & 8 bolts

4 BOLT1

3

2

4

2

5

8 BOLT1

3

4

7

86

4 Bolts

8 Bolts

Sequence Order

1 2

3 - 4

Rotation Order

1

3

2

4

Sequence Order

1 2

3 4

5 6

7 8

Rotation Order

1

7

3

5

2

8

4

6

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Figure 6 Typical Criss-Cross Bolt Tightening Sequence for bolts 12 & 16 bolts

12 BOLT

1

3

2

4

5

9 7

11

6

108

12

12 Bolts

2

15

16 BOLT1

3

4

5

7

68

13

9

11

16

12 14

10

16 Bolts

Rotation Order

1

5

9

3

7

11

2

6

10

4

8

12

Sequence Order

1 2

3 4

5 6

7 8

9 10

11 12

Sequence Order

1 2

3 4

5 6

7 8

9 10

11 12

13 14

15 16

Rotation Order

1

5

9

13

3

11

7

15

2

10

6

14

4

12

8

16

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Figure 7 Typical Criss-Cross Bolting Tightening Sequence for bolts 24 & bolts 28

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Figure 8 Typical Criss-Cross Bolt Tightening for bolts 32

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Figure 9 Typical Criss-Cross Bolt Tightening Sequence for bolt 36

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Figure 10 Typical Criss-Cross Bolt Tightening Sequence for bolts 40

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Appendix A

Torque Tables

The following tables contain recommended torque values for a range of standard ASME

B16.5or MSS SP44 flanges (made from materials with a minimum yield strength greater than

30,000lbf/in2), various gasket types Molykote 1000 lubricant (co-efficient of friction of 0.11)

and the following bolt materials: ASTM A193 B7, B7M and B16, ASTM A320 L7, L7M and

L43.

Table 2

Sheet Gaskets Nitrile Rubber-based Reinforced eg Klingersil

Nominal

Bore

Class 150 Class 300 Class 600

Minimum Bolt

Torque

Minimum Bolt

Torque

Minimum Bolt

Torque

Nm Ft-lbs Nm Ft-lbs Nm Ft-lbs

1/2 30 22 30 22 48 35

30 22 59 43 94 69

1 36 26 59 43 94 69

1 48 35 94 69 105 78

1 48 35 165 121 185 137

2 94 69 94 69 105 78

2 94 69 165 121 165 121

3 117 86 165 121 185 137

4 94 69 165 121 329 243

6 165 121 185 137 441 325

8 185 137 296 218 714 526

10 263 194 441 325 897 662

12 263 194 642 474 897 662

14 392 289 571 421 1213 894

16 392 289 897 662 1593 1175

18 571 421 897 662 2044 1507

20 571 421 897 662 2044 1507

24 797 588 1593 1175 3194 2356

Note : All value are for lubricated bolt(co-efficient of friction = 0.11).

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Appendix B

Table Torque

Table 3

Spiral-wound Gasket with Graphite Filler

Nominal

Bore

Class 150 Class 300 Class 600 Class 900 Class 1500 Class 2500

Minimum

Bolt Torque

Minimum

Bolt Torque

Minimum

Bolt Torque

Minimum

Bolt Torque

Minimum

Bolt Torque

Minimum

Bolt Torque

Nm ft-lbs Nm ft-lbs Nm ft-lbs Nm ft-lbs Nm ft-lbs Nm ft-lbs

1/2 48 35 48 35 48 35 165 121 165 121 185 137

48 35 94 69 94 69 165 121 185 137 206 152

1 48 35 94 69 94 69 263 194 296 218 329 243

1 48 35 94 69 105 78 296 218 329 243 538 397

1 54 40 165 121 185 137 441 325 489 361 785 579

2 94 69 94 69 105 78 263 194 329 243 538 397

2 105 78 165 121 165 121 392 289 489 361 714 526

3 117 86 165 121 185 137 329 243 714 526 1096 809

4 105 78 185 137 329 243 642 474 997 735 1947 1436

6 185 137 185 137 441 325 714 526 1347 994 4332 3195

8 206 152 296 218 714 526 1213 894 2271 1675 4332 3195

10 263 194 441 325 897 662 1347 994 3549 2618 8598 6341

12 296 218 642 474 897 662 1347 994 4332 3195 11536 8509

14 441 325 642 474 1213 864 1770 1306 5599 4129 - -

16 392 289 897 662 1593 1175 2271 1675 7738 5707 - -

18 571 421 897 662 2044 1507 3549 2618 10383 7658 - -

20 571 421 897 662 2044 1507 4332 3195 13530 9979 - -

24 797 588 1593 1175 3194 2356 7738 5707 21675 15987 - -


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Appendix C

Table Torque

Table 4

Ring Type Joint Gasket

Nominal

Bore

Class 150 Class 300 Class 600 Class 900 Class 1500 Class 2500

Minimum

Bolt Torque

Minimum

Bolt Torque

Minimum

Bolt Torque

Minimum

Bolt Torque

Minimum

Bolt Torque

Minimum

Bolt Torque

Nm ft-lbs Nm ft-lbs Nm ft-lbs Nm ft-lbs Nm ft-lbs Nm ft-lbs

1/2 - - 48 35 48 35 165 121 165 121 206 152

- - 94 69 94 69 165 121 185 137 206 152

1 48 35 94 69 94 69 263 194 296 218 362 267

1 48 35 94 69 105 78 263 194 296 218 538 397

1 48 35 165 121 165 121 392 289 441 325 785 579

2 94 69 94 69 105 78 263 194 329 243 538 397

2 94 69 165 121 165 121 392 289 441 325 785 579

3 94 69 165 121 185 137 296 218 714 526 997 735

4 94 69 165 121 296 218 642 474 997 735 1947 1436

6 165 121 185 137 441 325 642 474 1213 894 4766 3515

8 165 121 296 218 642 474 1213 893 2271 1675 4766 3515

10 263 194 392 289 897 662 1213 893 3549 2618 8598 6341

12 263 194 571 421 897 662 1213 893 4332 3195 12690 9360

14 392 289 571 421 1213 894 1770 1306 6221 4588 - -

16 392 289 797 588 1593 1175 2271 1675 8598 6341 - -

18 571 421 797 588 2044 1507 3549 2618 11536 8509 - -

20 571 421 897 662 2044 1507 4332 3195 15034 1108 - -

24 797 588 1593 1175 3194 2356 7738 5707 24083 17763 - -


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Appendix D

Table 5

Torque Guide for ASTM A 193 Grade B7 Stud

Bolt Tension Based On 65 Percent Yield

Imperial B7

Toque

(ft.lbs)

Pressure pump (Psi)

BOLT SIZE

DIA X TPI

THREAD

PER INCH

HEX NUT

STRESS

AREA

(IN

2

)

MIN

YEILD

BOLT

TENSION

(LBS)

COEF OF

FRICTION

(0.12)

W200 W400 W8000 W1500

x 10 10 1-1/4 0.334 105,000 22,815 171 - - - -

7/8 x 9 9 1-7/16 0.461 31,497 276 1,378 - - -

1 x 8 8 1-5/8 0.605 105,000 41,321 413 2,066 - - -

1-1/8 x 8 8 1-13/16 0.790 105,000 53,921 607 3,033 1,517 - -

1-1/4 x 8 8 2 0.999 105,000 68,195 852 4,262 2,131 - -

1-3/8 x 8 8 2-3/16 1.233 105,000 84,144 1,157 5,785 2,892 1,446 -

1-1/2 x 8 8 2-3/8 1.491 105,000 101,766 1,526 7,632 3,816 1,908 -

1-5/8 x 8 8 2-9/16 1.774 105,000 121,063 1,967 9,836 4,918 2,459 -

1-3/4 x 8 8 2-3/4 2.08 105,000 142,035 2,486 - 6,214 3,107 1,658

1-7/8 x 8 8 2-15/16 2.413 105,000 164,680 3,088 - 7,719 3,860 2,060

2 x 8 8 3-1/8 2.769 105,000 189,000 3,780 - 9,450 4,725 2,521

2-1/8 x 8 8 3-5/16 3.150 105,000 214,994 4,569 - - 5,711 3,047

2-1/4 x 8 8 3-1/2 3.555 105,000 242,662 5,460 - - 6,825 3,642

2-3/8 x 8 8 3-11/16 3.985 105,000 272,005 6,460 - - 8,075 4,309

2-1/2 x 8 8 3-7/8 4.440 105,000 303,022 7,576 - - 9,469 5,058

2-3/4 x 8 8 4-1/4 5.422 95,000 334,832 9,208 - - - 6,142

3 x 8 8 4-5/8 6.503 95,000 401,562 12,047 - - - 8,035

3-1/4 x 8 8 5 7.682 95,000 474,350 15,416 - - - -

3-1/2 x 8 8 5-3/8 8.959 95,000 553,198 19,362 - - - -

3-3/4 x 8 8 5-3/4 10.334 95,000 638,105 23,929 - - - -

4 x 8 8 6-1/8 11.807 95,000 729,071 29,163 - - - -

4-1/4 x 8 8 6-1/2 13.378 75,000 652,181 27,718 - - - -

4-1/2 x 8 8 6-7/8 15.047 75,000 733,564 33,010 - - - -

4-3/4 x 8 8 7-1/4 16.815 75,000 819,730 38,937 - - - -

5 x 8 8 7-5/8 18.681 75,000 910,680 45,534 - - - -

5-1/4 x 8 8 8 20.644 75,000 1,006,413 52,837 - - - -

5-1/2 x 8 8 8-3/8 22.706 75,000 1,106,930 60,881 - - - -

5-3/4 x 8 8 8-3/4 24.688 75,000 1,212,231 69,703 - - - -

6 x 8 8 9-1/8 27.124 75,000 1,322,315 79,399 - - - -


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Appendix E

Table 6

Target Bolt Stress For Gasket Seating and Operation ASME/ANSI B16.5 Class

150# with Spiral Wound Gaskets

Hydrotest

Pressure

(Psig)

Target Bolt Stress (Ksi) (1)

Nominal Pipe Size (NPS-Inches)

2 3 4 6 8 10 14 16 18 20 24

0 - 290 23.3 39.9 28.9 32.4 43.5 25.4 32.4 26.8 25.0 24.2 21.3

Table 7



Hydrotest

Pressure

(Psig)



2 3 4 6 8 10 12 14 16 18 20 24

0 - 400 11.6 13.3 19.3 21.6 20.9 14.5 14.0 12.2 11.9 12.7 13.9 11.5

450 11.6 13.3 19.3 21.6 20.9 14.5 14.0 12.2 11.9 12.7 13.9 12.1

500 11.6 13.3 19.3 21.6 20.9 14.5 14.0 12.2 11.9 12.7 14.9 13.5

550 11.6 13.3 19.3 21.6 20.9 14.5 14.0 12.8 12.9 13.9 16.4 14.8

600 11.6 13.3 19.3 21.6 20.9 14.5 15.2 14.0 14.1 15.2 17.8 16.2

650 11.6 13.3 19.3 21.6 20.9 16.0 16.4 15.2 15.3 16.4 19.3 17.5

700 11.6 13.3 19.3 21.6 22.0 17.2 17.7 16.3 16.5 17.7 20.8 18.9

750 11.6 13.3 19.3 21.6 23.6 18.5 19.0 17.5 17.6 19.0 22.3 20.2

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Table 8



Hydrotest

Pressure

(Psig)



2 3 4 6 8 10 12 14 16 18 20 24

100 11.6 13.3 16.6 13.3 13.4 10.2 10.2 8.6 8.7 8.8 8.0 7.0

200 11.6 13.3 16.6 13.3 13.4 10.2 10.2 8.6 8.7 8.8 8.0 7.0

300 11.6 13.3 16.6 13.3 13.4 10.2 10.2 8.6 8.7 8.8 8.0 7.0

400 11.6 13.3 16.6 13.3 13.4 10.2 10.2 8.6 8.7 8.8 8.0 7.0

500 11.6 13.3 16.6 13.3 13.4 10.2 10.2 8.6 8.7 8.8 8.3 8.2

600 11.6 13.3 16.6 13.3 13.4 10.2 10.2 9.1 9.6 10.2 10.0 9.9

700 11.6 13.3 16.6 13.3 13.4 10.8 11.6 10.6 11.2 11.9 11.6 11.5

800 11.6 13.3 16.6 13.4 15.0 12.3 13.2 12.1 12.8 13.6 13.3 13.1

900 11.6 14.2 16.6 15.1 16.9 13.8 14.9 13.7 14.4 15.3 14.9 14.8

1000 12.7 15.8 18.3 16.7 18.8 15.4 16.6 15.2 16.0 16.9 16.6 16.4

1100 13.9 17.4 20.2 18.4 20.7 16.9 18.2 16.7 17.5 18.6 18.3 18.1

1200 15.2 18.9 22.0 20.1 22.5 18.5 19.9 18.2 19.1 20.3 19.9 19.7

1300 16.5 20.5 23.8 21.7 24.4 20.0 21.5 19.7 20.7 22.0 21.6 21.4

1400 17.7 22.1 25.7 23.4 26.3 21.5 23.2 21.2 22.3 23.7 23.2 23.0

1500 19.0 23.7 27.5 25.1 28.2 23.1 24.8 22.8 23.9 25.4 24.9 24.6

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Table 9



Hydrotest

Pressure

(Psig)



3 4 6 8 10 12 14 16 18 20 24

0 - 400 12.4 9.6 10.1 0.0 7.3 7.8 7.0 6.7 6.3 5.7 4.2

500 12.4 9.6 10.1 7.9 7.3 7.8 7.0 6.7 6.3 6.1 5.1

600 12.4 9.6 10.1 7.9 7.3 7.8 7.3 7.7 7.3 7.3 6.2

700 12.4 9.6 10.1 7.9 8.1 9.0 8.5 9.0 8.5 8.5 7.2

800 12.4 9.6 10.1 9.0 9.3 10.2 9.7 10.2 9.7 9.8 8.2

900 12.4 9.6 11.4 10.1 10.4 11.5 10.9 11.5 10.9 11.0 9.3

1000 12.8 10.5 12.7 11.2 11.6 12.8 12.1 12.8 12.1 12.2 10.3

1100 14.0 11.6 13.9 12.3 12.7 14.1 13.4 14.1 13.3 13.4 11.3

1200 15.3 12.7 15.2 13.4 13.9 15.4 14.6 15.4 14.5 14.7 12.3

1300 16.6 13.7 16.5 14.6 15.1 16.6 15.8 16.6 15.7 15.9 13.4

1400 17.9 14.8 17.7 15.7 16.2 17.9 17.0 17.9 16.9 17.1 14.4

1500 19.1 15.8 19.0 16.8 17.4 19.2 18.2 19.2 18.1 18.3 15.4

1600 20.4 16.9 20.3 17.9 18.5 20.5 19.4 20.5 19.4 19.5 16.5

1700 21.7 17.9 21.5 19.0 19.7 21.8 20.6 21.8 20.6 20.8 17.5

1800 23.0 19.0 22.8 20.2 20.9 23.1 21.8 23.0 21.8 22.0 18.5

1900 24.2 20.0 24.1 21.3 22.0 24.3 23.1 24.3 23.0 23.2 19.5

2000 25.5 21.1 25.3 22.4 23.2 25.6 24.3 25.6 24.2 24.4 20.6

2100 26.8 22.2 26.6 23.5 24.3 26.9 25.5 26.9 25.4 25.6 21.6

2200 28.1 23.2 27.9 24.6 25.5 28.2 26.7 28.2 26.6 26.9 22.6

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Table 10



Hydrotest

Pressure

(Psig)



2 3 4 6 8 10 12 14 16 18 20 24

200 8.6 7.5 7.9 6.6 5.9 5.4 4.2 3.3 3.5 3.5 3.2 2.9

300 8.6 7.5 7.9 6.6 5.9 5.4 4.2 3.3 3.5 3.5 3.2 2.9

400 8.6 7.5 7.9 6.6 5.9 5.4 4.2 3.3 3.5 3.5 3.2 2.9

500 8.6 7.5 7.9 6.6 5.9 5.4 4.2 3.3 3.5 3.5 3.2 3.2

600 8.6 7.5 7.9 6.6 5.9 5.4 4.2 3.7 3.8 4.0 3.9 3.9

700 8.6 7.5 7.9 6.6 5.9 5.6 4.9 4.3 4.5 4.6 4.5 4.5

800 8.6 7.5 7.9 6.6 6.3 6.4 5.6 4.9 5.1 5.3 5.2 5.2

900 8.6 7.5 7.9 7.3 7.1 7.2 6.3 5.5 5.7 6.0 5.8 5.8

1000 8.6 7.5 8.4 8.1 7.9 8.0 7.0 6.1 6.4 6.6 6.5 6.5

1100 8.6 8.3 9.3 8.9 8.7 8.8 7.7 6.7 7.0 7.3 7.1 7.1

1200 9.1 9.0 10.1 9.7 9.5 9.6 8.4 7.3 7.6 7.9 7.8 7.7

1300 9.8 9.8 11.0 10.5 10.3 10.4 9.1 7.9 8.3 8.6 8.4 8.4

1400 106 10.5 11.8 11.4 11.1 11.2 9.8 8.5 8.9 9.3 9.1 9.0

1500 11.4 11.3 12.7 12.2 11.9 12.1 10.5 9.2 9.6 9.9 9.7 9.7

1600 12.1 12.0 13.5 13.0 12.7 12.9 11.2 9.8 10.2 10.6 10.4 10.3

1700 12.9 12.8 14.4 13.8 13.5 13.7 11.9 10.4 10.8 11.3 11.0 11.0

1800 13.6 13.6 15.2 14.6 14.3 14.5 12.6 11.0 11.5 11.9 11.7 11.6

1900 14.4 14.3 16.0 15.4 15.0 15.3 13.2 11.6 12.1 12.6 12.3 12.3

2000 15.1 15.1 16.9 16.2 15.8 16.1 13.9 12.2 12.7 13.2 13.0 12.9

2100 15.9 15.8 17.7 17.0 16.6 16.9 14.6 12.8 13.4 13.9 13.6 13.6

2200 16.7 16.6 18.6 17.8 17.4 17.7 15.3 13.4 14.0 14.6 14.3 14.2

2300 17.4 17.3 19.4 18.6 18.2 18.5 16.0 14.0 14.7 15.2 14.9 14.8

2400 18.2 18.1 20.3 19.5 19.0 19.3 16.7 14.6 15.3 15.9 15.6 15.5

2500 18.9 18.8 21.1 20.3 19.8 20.1 17.4 15.3 15.9 16.6 16.2 16.1

2600 19.7 19.6 22.0 21.1 20.6 20.9 18.1 15.9 16.6 17.2 16.9 16.8

2700 20.5 20.3 22.8 21.9 21.4 21.7 18.8 16.5 17.2 17.9 17.5 17.4

2800 21.2 21.1 23.6 22.7 22.2 22.5 19.5 17.1 17.8 18.5 18.2 18.1

2900 22.0 21.8 24.5 23.5 23.0 23.3 20.2 17.7 18.5 19.2 18.8 18.7

3000 22.7 22.6 25.3 24.3 23.8 24.1 20.9 18.3 19.1 19.9 19.5 19.4

3100 23.5 23.3 26.2 25.1 24.5 24.9 21.6 18.9 19.8 20.5 20.1 20.0

3200 24.2 24.1 27.0 25.9 25.3 25.7 22.3 19.5 20.4 21.2 20.8 20.7

3300 25.0 24.8 27.9 26.8 26.1 26.5 23.0 20.1 21.0 21.9 21.4 21.3

3400 25.8 25.6 28.7 27.6 26.9 27.3 23.7 20.7 21.7 22.5 22.1 21.9

3500 26.5 26.3 29.6 28.4 27.7 28.1 24.4 21.4 22.3 23.2 22.7 22.6

3600 27.3 27.1 30.4 29.2 28.5 28.9 25.1 22.0 22.9 23.8 23.4 23.2

3700 28.0 27.9 31.2 30.0 29.3 29.7 25.8 22.6 23.6 24.5 24.0 23.9

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Table 11



Hydrotest

Pressure

(Psig)



2 3 4 6 8 10 12

200 6.6 5.9 5.2 4.3 3.7 2.8 3.0

300 6.6 5.9 5.2 4.3 3.7 2.8 3.0

400 6.6 5.9 5.2 4.3 3.7 2.8 3.0

500 6.6 5.9 5.2 4.3 3.7 2.8 3.0

600 6.6 5.9 5.2 4.3 3.7 2.8 3.0

700 6.6 5.9 5.2 4.3 3.7 3.0 3.3

800 6.6 5.9 5.2 4.3 4.0 3.4 3.8

900 6.6 5.9 5.2 4.8 4.5 3.8 4.3

1000 6.6 5.9 5.6 5.3 5.0 4.3 4.8

1100 6.6 6.5 6.1 5.8 5.5 4.7 5.3

1200 6.9 7.1 6.7 6.4 6.0 5.1 5.7

1400 8.1 8.3 7.8 7.4 7.0 6.0 6.7

1600 9.2 9.4 8.9 8.5 8.0 6.8 7.6

1800 10.4 106 10.0 9.5 9.0 7.7 8.6

2000 11.5 11.8 11.2 10.6 10.0 8.5 9.6

2200 12.7 13.0 12.3 11.7 11.0 9.4 10.5

2400 13.8 14.2 13.4 12.7 12.0 10.2 11.5

2600 15.0 15.3 14.5 13.8 13.0 11.1 12.4

2800 16.1 16.5 15.6 14.8 14.0 11.9 13.4

3000 17.3 17.7 16.7 15.9 15.0 12.8 14.3

3200 18.4 18.9 17.9 16.9 16.0 13.6 15.3

3400 19.6 20.1 19.0 18.0 17.1 14.5 16.3

3600 20.7 21.2 20.1 19.1 18.1 15.3 17.2

3800 21.9 22.4 21.2 20.1 19.1 16.2 18.2

4000 23.0 23.6 22.3 21.2 20.1 17.1 19.1

4200 24.2 24.8 23.4 22.2 21.1 17.9 20.1

4400 25.3 26.0 24.6 23.3 22.1 18.8 21.0

4600 26.5 27.1 25.7 24.4 23.1 19.6 22.0

4800 27.6 28.3 26.8 25.4 24.1 20.5 22.9

5000 28.8 29.5 27.9 26.5 25.1 21.3 23.9

5200 30.0 30.7 29.0 27.5 26.1 22.2 24.9

5400 31.1 31.9 30.1 28.6 27.1 23.0 25.8

5600 32.3 33.0 31.3 29.7 28.1 23.9 26.8

5800 33.4 34.2 32.4 30.7 29.1 24.7 27.7

6000 34.6 35.4 33.5 31.8 30.1 25.6 28.7

6200 35.7 36.6 34.6 32.8 31.1 26.4 29.6

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Appendix F

Form Flange Joint Records

FLANGE JOINT RECORDS

Project : Technician : 1

Customer : 2

Area : 3

Scope / Job No. : Date of Tightening :

Line No. : Flange No. :

P & ID No. : SH1 No. :

Location : MC1 No. :

Size & Class : Bold Condition

Flange Material : Good Fair Poor

Gasket Type : Flange Face Condition

Bolt Material : Good Poor Not Visible

Bolt Diameter : Flange Preparation by :

Nuts A/F Size : Min Thread Protrusion :

No. of Bots : Thread Form :

Hydrostatic Test Press (lbs/inch) : Joint Configuration :

Bolt Tension Model : Torque Wrench Model :

Manufacture : Manufacture :

Serial No. : Serial No. :

Residual Bolt Load : Tonf Residual Bolt Stress : Lb/ln2

Coef of Friction : Torque : Ft Lbs

Bolt Tensioner Record

No. of Tensioner : Tensioner Pressure (lbs ln

2

)

Percentage Tool Coverage : -1

st

Pass Pressure :

Bolt Tensioner Type : -2

nd

Pass Pressure :

Pump Serial No. : -Checking Pressure :

Torque Wrench Type : Lubricant Used :

Pump Serial No. : Lubricant appllied by :

Torque Value

-1

st

Pass 30% of Torque : Ft Lbs -3

rd

Pass 100% of Torque :

-2

nd

Pass 60% of Torque : -4

th

Pass 100% (Final) :

(For Check of Torque)

Technician of Torque Wrench Review by TAR Job Officer Witnessed by QC Inspector

Name & Sign Name & Sign Name & Sign

Date : Date : Date :

Flange Data Visual Check

Flange Identification

Tension Method Use

Specified Loads

Torque Record

Review and Acceptance Signature

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Flange Joint Bolt Tightening Procedure

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Transcript of Flange Joint Bolt Tightening Procedure