Contact us

  • Add: Yanta Road Yanshan County of Hebei Province,061300
  • Tel: 0317-6289718/86-22-87709736 /26679690
  • 15531712002
  • Fax: 86-0317-628971/86-22-87709736
  • PC: 061300
  • E-Mail: hbblq@alloypipe.cn

Detection device

 

 

 

 

 hydrostatic test

 chemical composition 1

 eddy current test

 

 

 

 X-ray detection apparatus

 chemical composition 2

 supersonic inspection

 

 

Size and weight deviation

Allowable deviation of pipe diameter (inch(mm)

ACC.TOASTM A450

 

 

Diameter  (mm)

Allowable deviationinmm

hot finished steel seamless pipes

4 101.6

4-7.5101.6-190.5

7.5-9190.5-228.6

1/64(0.4)

1/64(0.4)

1/64(0.4)

1/320.8

3/641.2

1/611.

cold finished steel seamless pipelines

125.4

1-1.525.4-38.1

1.5-2.550.8-63.5

2-2.550.8-63.5

2.5-363.5-76.2

3-476.2-101.6

4-7.5101.6-190.5

7.5(>228.6

0.0040.1

0.0060.15

0.0080.2

0.1010.25

0.0120.3

0.01500.38

0.01500.38

0.01500.38

 

0.0040.1

0.0060.15

0.0080.2

0.1010.25

0.0120.3

0.01500.38

0.0250.64

0.0451.14

 

Allowable deviation of  pipe wall thicknessACC.TOASTM A450

diameter

In.(mm)

Allowable  thickness deviation%

0.0952.4

0.095-0.1502.4-3.8

0.150-0.180

3.8-4.6

0.1804.6

+

+

+

+

hot finished steel seamless pipes

4101.6

4101.6

40

0

35

35

0

0

33

33

0

0

28

28

0

0

cold finished steel seamless pipelines

1.538.1

1.538.1

 

 

20

22

0

0

 

 

Allowable deviation of pipe weight per inchACC.TOASTM A450

Processing art

Allowable deviation per inch

 

+

_

 Finished steel

16

0

Outside Diameter≤1.538.1mm

Outside Diameter≥1.538.1mm

12

13

0

0