Select appropriate pipe OD for calculating Fitting (B16.11-2011)

[Tony1t]

Hi everyone,
I was caculating a minimum wall thickness for half coupling fitting NPS 11/2, but B16.11-2011 said that "Within these limits, the minimum wall thickness for pipe to be used with a Table 7 Class designated fitting shall be computed based on appropriate size straight seamless pipe of equivalent material as the fitting....... ". How to select the OD as the appropriate size? I had compared the B36.10 and B16.11 for OD based on the NPS found that is different OD. My question is :
Whether is based on B36.10 for the size OD or based on B16.11 for the size OD ?　
I do appreciated you response.

 

[mechyp]

Hi Tony

As per my interpretation OD of Coupling shall be as per ASME B16.11 and only thickness shall use form ASME B36.10 of respected Pipe size and SCH.

mechyp

 

[pennpiper]

TonyTao,
You do not get to select the OD of the pipe. You select the NPS (Nominal Pipe Si8ze) and that sets the OD.
= 1-1/2" NPS pipe has an OD of 1.9" All schedules and weights
= Wall thickness & ID varies with Schedule and Weight
= Sch 5 = .005" wall & 1.774" ID
= Sch 10 = .109" wall & 1.682" ID
= Sch 40 = .145" Wall & 1.610" ID
= Sch 80 = .200" Wall & 1.500" ID
= Sch 160 = .281" Wall & 1.338" ID
= XXH = .400 Wall" & 1.100" ID

I hope this is helpful




prognosis: Lead or Lag

 

[Tony1t]

Thks mechyp

 

[GenB]

The min. T of the coupling cannot be less than the pipe sch of the same size, I believe the corresponding Sch for 1.1/2 couplg is sch is S160