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API spiral weld pipe tolerances: 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.
| Item |
APISPE 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 |