API SSAW steel pipe tolerances

Date:2024-07-24

In the production process, since the actual size is difficult to achieve the nominal size requirement, that is, it is often larger or smaller than the nominal size, the standard specifies that a difference is allowed between the actual size and the nominal size. This article will introduce briefly the API SSAW steel pipe tolerances.

Item	API SPE 5L
Item	API SPE 5L
Wall thickness tolerance	D＜508mm:A、B、A25+15%t－12.5%t D＞508mm:A、B、A25+17.5%t－12.5%t X42－X80: +19.5% t－8.0%t
Pipe body	D＜508mm:±0.75%D D=508－914mm:±0.75%D－0.25%D D＞914mm: +6.35－3.2mm
Pipe end length range	D＜273.1mm: +1.59mm－0.4mm D=323.9－＜508mm+2.38mm D＞508 －0.79mm
Pipe end ovality	D＜508mm:－ D＞508mm:±1%D
Weld reinforcement	t≤12.7mm:≤3.18mm t＞12.7mm:≤4.76mm
Pipe end or bevelled surface lamination or slag inclusion	transverse≤6.35mm