Identifying Valves for Interchanges & Retrofits

Part ICasting Markings & Tags on Ball Valves

2

Overview

Valve markings Tagging information Marking & tagging deciphered Other needed information Metric equivalents Pressure & Temperature

3

Sound Familiar?

“Help, I need one of these…”

So how do you find out what “this” is?

Typical Valve Markings

valve size

body materia

lvalve size

pressure class

casting number

mounting information

Markings Deciphered: Valve Size

DN32 is simply “diametre nominel” and is the metric equivalent of nominal pipe size with the next number the size of the pipe in millimeters.

The number next to that is the pipe size in inches.

valve size

valve size

Markings Deciphered: Mounting Information

F04/F05 refers to the ISO mounting* patterns that are used to mount actuators.

mounting information

* Future series

Markings Deciphered: Body Material

1.4408-CF8M refers to valve body material. CF8M is a cast 316 stainless steel.

body materia

l

Markings Deciphered: Pressure Class

PN is “pressure nominal” and is the pressure class of the valve in bars (1 bar=14.5038 psi). 1000 is adding the psi equivalent to make it easy to look at in the field.

pressure class

Markings Deciphered: Pressure Class

R8F98 is a casting number from the foundry. It is used to track materials and batches. These are needed to supply Material Test Reports (MTRs). Depending on the body style there can be more than one of these marks.

casting number

Other Markings You Might See

WCB - a grade of cast carbon steel commonly used for valves

CW617N - the European designation for brass valves with high zinc content

NACE – indicates that the valve is rated for sour gas service

ANSI - flange class of valves* 125/150 250/300 600 up to 2500

FNPT or MNPT - male or female threaded end connections

WOG – stands for water, oil, gas and is an older way of representing a valve’s pressure rating.

SWP – Steam working pressure

* Future series

11

Valve Tag Information

manufacturer

informationbody material

valve seat

pressure rating

trim

valve model #

Valve Tagging Deciphered

Body refers to the valve casting portion of the assembly.

Seat is the material the valve ball is going to seal against. Seats are offered in a wide range of materials and can even be metal for severe services.

A valve’s trim includes the internal parts of the valve such as the ball and stem.

CWP stands for Cold Working Pressure and indicates the valve pressure rating from -20 to 100F. Higher temperatures can severely degrade a valve or pipe’s pressure rating. Check out the pressure/temperature chart on slide 11.

12

Putting it Together in Part I

Able to Identify Materials of

construction Valve size Pressure rating Valve mfg. & model #

Up Next End connections Automation Butterfly valves Mounting hardware

Tip:When possible, try and get information on actual working conditions of the valve. It helps to get the whole picture and allows for a cost-effective and accurate quotation.

Metric Equivalents

1 bar = 14.058 psi 25.4 mm = 1” Deg F = (C+17.78) X1.8 1 kilopascal(kPa) = .145

psi

NPS DN

1/4" 8 mm

3/8" 10 mm

1/2" 15 mm

3/4" 20 mm

1" 25 mm

1-1/4" 32 mm

1-1/2" 40 mm

2" 50 mm

2-1/2" 65 mm

3" 80 mm

4" 100 mm

5" 125 mm

6" 150 mm

PN Flange Class

20 150

50 300

68 400

100 600

150 900

250 1500

420 2500

15

Maximum Allowable non-shock Pressure (psig)

Temperature(oF)

Pressure Class (lb)

150 300 400 600 900 1500 2500

Hydrostatic Test Pressure (psig)

450 1125 1500 2225 3350 5575 9275

-20 to 100 285 740 990 1480 2220 3705 6170

200 260 675 900 1350 2025 3375 5625

300 230 655 875 1315 1970 3280 5470

400 200 635 845 1270 1900 3170 5280

500 170 600 800 1200 1795 2995 4990

600 140 550 730 1095 1640 2735 4560

650 125 535 715 1075 1610 2685 4475

700 110 535 710 1065 1600 2665 4440

750 95 505 670 1010 1510 2520 4200

800 80 410 550 825 1235 2060 3430

850 65 270 355 535 805 1340 2230

900 50 170 230 345 515 860 1430

950 35 105 140 205 310 515 860

1000 20 50 70 105 155 260 430

Maximum allowable non-shock pressure (psig) and temperature ratings for steel pipe flanges and flanged fittings according the American National Standard ANSI B16.5 - 1988. The values in this table apply to Material Group 1.1 (i.e. certain carbon steel grades). For other Material Groups the Pressure-Temperature Ratings are different. Most carbon steels are only acceptable for temperatures below 800 F

Pressure & Temperature

Thank You

Contact us - sales@bitorq.com or 630-208-9343