The difference between A335 P12 and A213 T12

 

ASME US standard alloy steel pipe A335 P12 and A213 T12 difference.

 

T- refers to Tube ASTM SA-213 T12

P – refers to Pipe ASTM SA-335 P12

ASTM has developed two sets of standards for pipe, respectively, for the boiler heating surface with pipe and pipe pipe, the two pipe the main differences are as follows:

 

  1. The diameter and thickness of the representation of different methods

Pipe diameter and thickness of the representation of the surface for the heating surface with the nominal diameter and the minimum thickness of the pipe with pipe NPS and pipe thickness series (schedule number). Wall thickness series from thin to thick for the 10,20,30,40,80,120,140,160 a total of eight series, of which 40 for the standard series, 80 for the thickening series, 120 for the special thick series.

 

It should be noted that the nominal diameter (NPS) of the United States is the same as that of the GB / T 1047 “nominal diameter of the piping element”, which is the size of the dimension, which is not more than the inner diameter, NPS2 As an example, the outer diameter of 2.375in (60.3mm), the diameter is related to the thickness of the wall series, 40, its inner diameter of 2.375-2 × 0.154 = 2.067in (52.5mm), 80 when the 2.375- 2 × 0.218 = 1.939in (49.3 mm).

 

  1. The diameter and thickness range are different

The pipe diameter and thickness of the pipe for heating surfaces are small, such as pipes supplied with SA-213 with a maximum outside diameter of 5 in (127 mm) and a minimum thickness of 0.5 in (13 mm). The pipe diameter and thickness of the pipe unlimited.

As a result of the two sets of standards for the pipe, so the chemical composition of the same heating surface and pipe with pipe, grade number is also different, such as the nominal composition of 1Cr-0.5Mo ferritic steel pipe, heating surface pipe grades SA-213, T12, pipe pipe for the SA-335, P12, the difference between the two pipe grades, one standard number is different, respectively SA-213 and SA-335, and then one is 12 before the addition of T And P, but for the austenitic steel pipe, the heating surface and pipe pipe grades are no longer added T or P, but a unified filling TP, such as the nominal composition of 18Cr-8Ni austenitic steel pipe, The pipe for the heating surface is SA-213, TP304H, and the pipe is SA-376 and TP304H.

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At Fushun Metal, we supply a wide range of metals for a variety of applications. Our products/stock includes: cold rolled steel tube, cold drawn steel tube, hollow bar, boiler tube, alloy steel tube, stainless steel tube, nickel alloy pipe,etc

 

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