MAWP for 2" NPT schedule 40 pipe 1

[Iqbal]

Hi,

I am looking for a standard for MAWP for threaded pipe; a methoed of calculating this would be great.

 

[metengr]

Additional information would be helpful;

1. What is the application?

2. What will the threaded pipe contain?

 

[Iqbal]

The pipe is used for metering natural gas. Therefore, the inner diameter is fixed. The pipe nipple is an integral part of the primary metering device. I am unsure of the thickness between the root of the thread and the pipe.

 

[tickle]

The standard to calculate the MAWP would be ANSI B31.3 using a threading allowance

ANSI B2.1 is the standard for threaded pipe that gives thread depths. You may be able to get a copy of the relevant dimensions from a piping stockist. My chart shows the maximum depth of thread for a 2" would be 1.767mm.

Also, generally you go you a schedule when you are threading pipe

Other factors that need to be considered would be operating temperature and materials of construction.

 

[Iqbal]

The material of construction is bar stock S 31603 stainless steel. The operating temperature is -35 to 120 degrees celsius.

 

[Fruz]

Tickle,

In response to your posting 15 Jul 04 20:10, what is the table that you are looking at for a maximum depth of thread for a 2" would be 1.767mm