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Hollow section,OCTG pipe,LSAW steel pipe
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  • Hollow section,OCTG pipe,LSAW steel pipe
  • Hollow section,OCTG pipe,LSAW steel pipe
  • Hollow section,OCTG pipe,LSAW steel pipe
  • Hollow section,OCTG pipe,LSAW steel pipe
  • Hollow section,OCTG pipe,LSAW steel pipe
  • Hollow section,OCTG pipe,LSAW steel pipe

Structural Steel Pipe

Ttype: Seamless Structural Pipe

Size :


WT:  6-350mm


Standard & Grade : ASTM A53/ASTM A519/ASTM A500/ASTM A252/JISG3441/EN10210/EN10297/DIN1629

Packing: Bundle or bulk , wooden case or other seaworthy packing or for the client's requirement

  • Description
  • Specification
  • Standard
  • Process
  • Packing

Structure seamless steel pipe is intended for mechanical and pressure applications and is also acceptable for ordinary uses in steam, water, gas, and air lines. It is suitable for welding, and suitable for forming operations involving coiling, bending, and flanging, subject to certain qualifications.

Structural Pipe Industry Uses

Regardless of application use, structural pipe is a material used across a vast array of industries. Some main industry uses include:

· Agriculture

· Automotive

· Construction

· Energy

· Machinery

· Oil and Gas

· Shoring

Outer Diameter Tolerance of DIN1629 ST37 Structural Steel Pipe

Outer Diameter (mm)

Outside Diameter Deviation

Pipe Body and Pipe End

Pipe End: It needs to be specially dealed.

≤ 100

±1%D OR ±0.5mm

± 0.4 mm

100 < D ≤ 200


± 0.5 % D

> 200


± 0.6% D

Wall Thickness & Tolerance of DIN1629 ST37Structural Steel Pipe

D ≤ 130 mm

130 < D ≤ 320 mm

320 < D ≤ 660 mm

S≤ 2Sn

2Sn < S ≤ 4Sn

> 4Sn

≤ 0.05D

0.05D < S ≤ 0.11D


≤ 0.05D

0.05D < S ≤ 0.09D

> 0.09D



± 9%


± 12.5%










Note: Sn is the length deviation of DIN1629 with standard thickness regulated in DIN2448.

ASTM A53 covers seamless and welded black and hot-dipped galvanized steel pipe in NPS 1⁄8 to NPS 26 [DN 6 to DN 650].
ASTM A519 covers several grades of carbon and alloy steel seamless mechanical tubing
ASTM A500/A500M covers cold-formed, welded and seamless carbon steel structural tubing in round,
square and rectangular shapes.
ASTM A252 for welded and seamless steel pipe piles. It covers the nominal wall thickness of cylinder shape steel pipe, rectangular pipe is not included.
JISG3441 for Alloy steel tubes for machine purpose
EN10210 for hot finished structural hollow sections of non-alloy and fine grain structural steels
EN 10297-1 for steel tubes for general mechanical applications
DIN1629 for Seamless Steel pipe Of Non Alloys Steels are made of unalloyed steels

There are probably hundreds of different methods for packing a pipe, and most of them have merit, but there are two principles that are vital for any method to work prevent rusting and Sea transportation security.

● Plastic caps plugged at the two sides of pipe ends

● Should be avoided by the steel strapping and transport damage

● Bundled signs should be uniform and consistent

● The same bundle(batch) of steel pipe should be came from the same furnace.

● The steel pipe has the same furnace number, the same steel grade, the same specifications.

Our packing can meet any needs of the customers.

Inquiry Online

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