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WT of seamless pipe

Date:2020-01-15View:483Tags:WT of seamless pipe

Seamless pipe are extensively applied for the nuclear device, gas, petrochemical, ship building and boiler industries. Below we will introduce the wall thickness tolerance of seamless steel pipe.

Types

Sizes

Allowed Tolerance

Ordinary Steel Pipe

Senior Steel Pipe

Hot rolled

Out diameter

<50

± 0.50 mm

± 0.40 mm

≥50

± 1 %

± 0.75 %

Wall thickness

<4

± 12.5 %

± 10 %

4-20

15%

± 10 %

-12.50%

 

≥20

± 12.5 %

± 10 %

Cold drawn

Out diameter

6-10

± 0.20 mm 

± 0.10 mm

>10-30

± 0.40 mm

± 0.20 mm 

>30-50

± 0.45 mm

± 0.25 mm 

>50

± 1 %

± 0.5 %

Wall thickness

≤1

± 0.15 mm

± 0.12 mm

1-3

15%

± 10 %

- 10 % 

>3

12.5

± 10 %

-10%