Power New Bolting Technology

Titan®

Superior Bolting Solutions®

Profile

Profile

Titan Technologies is based in Houston Texas. Titan is the fastest growing company in the bolting products industry with offices worldwide.

Titan Products and Services are provided Worldwide into the Power Generation including Wind and Heavy Industry sectors such as Defense, Marine, Mining, Offshore, Paper, Petrochem, Power, Quarrying, Refining, Steel and Sugar.

Our client list includes; ABB, AES, Alcoa, Alstom, ANI, Bellelli, BP, BHP Steel, Boral, CME, CSR, Dresser, EDF, FP&L Energy, Exxon-Mobile, Flour Daniels, Furmanite, Jaques, Macquarie Generation, MIM, Mitsubishi, Pacific Power, QCL, QNI, Saipem, Svedala, TEAM, Thiess, Toshiba, Upwind, etc…….

Titan®Superior Bolting Solutions®

Worldwide

Worldwide Agency Network

Titan Offices

Local Sales & Service

•Differential expansion leads to thread galling

•Long heating times

•Heat transfer into casing

•Long cooling periods - bolts & casings

•Bolt / element damage

•Safety

Average time per casing: 24-36 hrs

•No torsional stresses•Angle of rotation can be accurate

(for casings with no distortion)

The Old Method

No torsional stresses

Accurate

Fast

Repeatable

Safe

Average time per casing: 3-5 hrs

The New Method

Hi Temp Hydraulic Nut

• The Titan High Temperature Hydraulic Nut is a precision engineered, high pressure, high performance, hydraulically operated axial bolt tensioning device

• The Titan High Temperature Hydraulic Nut is suitable where;– accurate and reliable loading is required

on bolting

– vibration or torsional stresses are a problem

– regular maintenance requires repeated adjustment or removal of nuts

– confined or difficult access, where manual operation can lead to safety problems

Hi-Temp Hydraulic Nut

Spherical Washer designed to self-correct seating & bolting mis-alignment

Spherical Washer designed to self-correct seating & bolting mis-alignment

Piston with external buttressed screw-thread for Locking Ring

Piston with external buttressed screw-thread for Locking Ring

Locking Ring, to retain LoadLocking Ring, to retain Load

Nut body, which screws onto the Bolt using purpose designed screw-thread

Nut body, which screws onto the Bolt using purpose designed screw-thread

Nut body incorporates high-pressure threaded connections for power oil

Nut body incorporates high-pressure threaded connections for power oil

High Pressure seals contained within Nut body

High Pressure seals contained within Nut body

HiTemp Hydraulic Nut

High Pressure power oil Inlet connection

High Pressure power oil Inlet connection

High Pressure power oil inlet connection floods the sealed chamber

High Pressure power oil inlet connection floods the sealed chamber

High Pressure power oil Outlet is sealed

High Pressure power oil Outlet is sealed


High Pressure power oilHigh Pressure power oil

Piston and Nut Body apartPiston and Nut Body apart



Piston and Nut Body apartPiston and Nut Body apartThe bolt is stretched

accurately so applying the required tension, and providing the desired compressive force.

The bolt is stretched accurately so applying the

required tension, and providing the desired compressive force.



Piston and Nut Body apartPiston and Nut Body apart


Threaded Locking Ring, mounted on Piston, is screwed hand-tight up to the Nut-body, to retain the induced load tension in the bolt.

Threaded Locking Ring, mounted on Piston, is screwed hand-tight up to the Nut-body, to retain the induced load tension in the bolt.

Pressure is released, and oil can be extracted for high temperature applications.

Pressure is released, and oil can be extracted for high temperature applications.


Full Load is applied to Locking Ring

Full Load is applied to Locking Ring


When oil is removed, tightening operation is completed by removing High Pressure system, and glands from Nut-body.

When oil is removed, tightening operation is completed by removing High Pressure system, and glands from Nut-body.


The Hydraulic Nut is removed, by the reverse process, which unloads the Locking Ring, allowing easy removal of the Nut-body assembly

The Hydraulic Nut is removed, by the reverse process, which unloads the Locking Ring, allowing easy removal of the Nut-body assembly

No major physical force, large wrenches or torque tools are required to correctly fit and remove the

Hydraulic NUT

No major physical force, large wrenches or torque tools are required to correctly fit and remove the

Hydraulic NUT


32 x 1 ¾” HiTemp Hydradraulic Nuts – tensioned in less then 2 hours!!


• Titanproducts also manufactured

in ;

– Hydraulic Bolt & Hydraulic Washer configurations

– These incorporate the same precise tensioning features, and user benefits as do the well-proven

Hydraulic Nut– Components can be supplied in a

wide range of sizes and materials, as well as incorporating protective covers for service in abrasive or corrosive conditions

HydraBolt

HydraWasher


The size and pitch separation of the Bolts and Studbolts used in

securing Turbine casings does not permit

the use of regular tooling.

Bolting is generally carried out by thermal

elongation of the stud & measuring to check

elongation.

Restrictive Area High Load Requirement

Minimal Stud Protrusion

Height restrictions in some positions

ChallengesHi Temp

Hydraulic Nut

CASING Spot Face

•Standard turbine bolting

•Note closeness of bolting

•Note amount of bolt stand out from spot face

ChallengesChallenges

CASING Spot Face

Slimline Bridge

•Attempted solution is to reduce nut diameter thus making room for the tensioner reaction bridge within the spot face area

Reduced Nut

This creates a problem: The nut to casing contactarea is greatly reduced, thus increasing contact stresses to unacceptable levels

Attempted SolutionsAttempted Solutions

CASING Spot Face

ThickWasher

Slimline Bridge

Reduced Nut

To overcome this problem a thick washer is used;thus maintaining the casing contact stress area

This however means bolt has to be made longer!!

Attempted Solutions

CASING Spot Face

ThickWasher

Slimline Bridge

Reduced Nut

The bolt has also to be made longerto accommodate the tensioner

IT IS OBVIOUS THIS SYSTEM REQUIRES A CHANGE OFBOLTING, OFTEN A COST PROHIBITVE SOLUTION

Attempted SolutionsAttempted Solutions

FEA

BOLT

NUT

CASING Spot Face

•Standard turbine bolting

•Another long standing problem on traditionalbolting is the high stress concentration in the first thread fillet. Most bolts suffer stress crackingfatigue in this area and is where they rupture

More Problems!The challenges

CASING Spot Face

Tapered threads on the Bolt as adopted byWestinghouse, MHI, etc....

Tapered threads on the nut as adopted byGE, Toshiba. etc....

These are the attempted solutions for better distribution of stress in the threads

Attempted Solutions

SOLUTIONS WHICH HAVE BEEN PROVEN COMPLETELY INEFECTIVE

Attempted Solutions

CASING Spot Face

Slide on outer cone of nut

Screw on inner cone nut

Slide on tensioner bridge

Machine taper thread in bolt

Screw on one piece tensioner

No Stud Replacement

Nut to casing contactstress area is maintained as per the original nut

The Solution!!The Solution

The Critical InterfaceNote the smooth & even distribution of load from the high strength puller to the studboltNo part of the studbolt is overstressedPuller stud loads do not exceed allowable maximum

F.E.A.The Solution

STRESS IS DECREASED ACROSS THE SECTIONAL AREA

Stress

THE MODIFIED STUDBOLT HAS A BETTER DISTRIBUTION OF STRESS THAN STANDARD

SECTION 1

SECTION 2

2601.4

2441.0

The Solution!!

Load is transferred

from each thread,

through the cone

interface, down to

the nut to casing

contact area

Longer Bolt Life

No Thread Distortion

Dramatically less creep induced failure

Disassembles easily

Outer Cone provides stable platform for HydraJac Tensioner

Gives evenly distributed compressive load across the spotface

SUPERIOR CONE NUT CHARACTERISTICS

Benefits

CASING Spot Face

Apply Oil Pressure

Note both oil chambers now under pressure

Also note bolt is now stretched

And outer part of nut is clear frominner part

The Titan Solution!

CASING Spot Face

Tighten inner part of nut until it is snug with the outer cone

The Titan Solution!!

CASING Spot Face

Release oil pressure

The Titan Solution!!

CASING Spot Face

And unscrew the tensioner from the bolt

TheTitan

Solution!

CASING Spot Face

Screw in protection plug

The Titan Solution!

Testing

Solutions

Multiple Cell Tensioner High Force Output

Standard Stud Protrusion High Temperature Nut

Superior Bolting Solutions:

SolutionsSuperior Bolting Solutions:

Hi Temp Hydraulic

Nut

High Temperature Nuts / Tensioners:

IP Inner

Valve Cover

IP Outer

Applications

Where Else?

Turbine Casings, Loop Pipes, Valves, Boiler Feed Pumps, High Pressure Feed heaters, Boiler Circulation Pumps, Inner Casings, Outer Casing, Inlets, Crossovers, Outlets Steam Chests…….All

criti

cal B

olting

Applications

Superior Bolting Solutions®

Thank You

Any Questions?

Power New Bolting Technology

Documents

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