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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 |
±1%D |
± 0.5 % D |
|
> 200 |
±1%D |
± 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 |
>0.11D |
≤ 0.05D |
0.05D < S ≤ 0.09D |
> 0.09D |
|
0.05 |
12.50% |
± 9% |
17.50% |
± 12.5% |
±10% |
20% |
15% |
12.50% |
|
-10% |
-12.50% |
-15% |
-12.50% |
-10% |
||||
Note: Sn is the length deviation of DIN1629 with standard thickness regulated in DIN2448.
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 |
±1%D |
± 0.5 % D |
|
> 200 |
±1%D |
± 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 |
>0.11D |
≤ 0.05D |
0.05D < S ≤ 0.09D |
> 0.09D |
|
0.05 |
12.50% |
± 9% |
17.50% |
± 12.5% |
±10% |
20% |
15% |
12.50% |
|
-10% |
-12.50% |
-15% |
-12.50% |
-10% |
||||
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.
