Joho Steel Co., Ltd
JOHO STEEL CO.,LTD, founded in 1988, is a steel group which has integrated steel production, processing and trading into one. We specializes in manufacturing carbon seamless steel pipes, boiler tube
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LSAW Steel Pipe LSAW Welded Steel Pipe China Professional Manufacturer
Process :
LSAW - UO(UOE),RB(RBE),JCO(JCOE,COE)
DSAW -Double Submerged arc welded
Out Diameter : 323.9mm-1820mm(12''-72'')
Wall Thickness : 5.0 - 50mm
Length : 6 – 12m
Application : Used for low pressure liquid delivery, such as water, gas, and oil.
Standard : API 5L, ASTM 53, EN10217, DIN 2458. IS 3589, GB/T3091, GB/T9711
Certificate : API 5L PSL1 / PSL2
Steel Grade :
API 5L: GR B, X42, X46, X56, X60, X65, X70
ASTM A53: GR A, GR B, GR C
EN: S275, S275JR, S355JRH, S355J2H
GB: Q195, Q215, Q235, Q345, L175, L210, L245, L320, L360- L555
Surface : Fusion bond Epoxy coating, Coal Tar Epoxy, 3PE, Vanish Coating, Bitumen Coating, Black Oil coating as per customer’s requirement
Test : Chemical Component Analysis, Mechanical Properties (Ultimate tensile strength, Yield strength, Elongation), Technical Properties (Flattening Test, Bending Test, Blow Test, Impact Test), Exterior Size Inspection, Hydrostatic Test, X-ray Test.
Mill Test Certificate : EN 10204/3.1B
| Standard | Grade | Chemical Composition(max)% | Mechanical Properties(min) | |||||
| C | Mn | Si | S | P | Yield Strength(Mpa) | Tensile Strength(Mpa) | ||
| GB/T700-2006 | A | 0.22 | 1.4 | 0.35 | 0.05 | 0.045 | 235 | 370 |
| B | 0.2 | 1.4 | 0.35 | 0.045 | 0.045 | 235 | 370 | |
| C | 0.17 | 1.4 | 0.35 | 0.04 | 0.04 | 235 | 370 | |
| D | 0.17 | 1.4 | 0.35 | 0.035 | 0.035 | 235 | 370 | |
| GB/T1591-2009 | A | 0.2 | 1.7 | 0.5 | 0.035 | 0.035 | 345 | 470 |
| B | 0.2 | 1.7 | 0.5 | 0.03 | 0.03 | 345 | 470 | |
| C | 0.2 | 1.7 | 0.5 | 0.03 | 0.03 | 345 | 470 | |
| BS EN10025 | S235JR | 0.17 | 1.4 | - | 0.035 | 0.035 | 235 | 360 |
| S275JR | 0.21 | 1.5 | - | 0.035 | 0.035 | 275 | 410 | |
| S355JR | 0.24 | 1.6 | - | 0.035 | 0.035 | 355 | 470 | |
| DIN 17100 | ST37-2 | 0.2 | - | - | 0.05 | 0.05 | 225 | 340 |
| ST44-2 | 0.21 | - | - | 0.05 | 0.05 | 265 | 410 | |
| ST52-3 | 0.2 | 1.6 | 0.55 | 0.04 | 0.04 | 345 | 490 | |
| JIS G3101 | SS400 | - | - | - | 0.05 | 0.05 | 235 | 400 |
| SS490 | - | - | - | 0.05 | 0.05 | 275 | 490 | |
| API 5L PSL1 | A | 0.22 | 0.9 | - | 0.03 | 0.03 | 210 | 335 |
| B | 0.26 | 1.2 | - | 0.03 | 0.03 | 245 | 415 | |
| X42 | 0.26 | 1.3 | - | 0.03 | 0.03 | 290 | 415 | |
| X46 | 0.26 | 1.4 | - | 0.03 | 0.03 | 320 | 435 | |
| X52 | 0.26 | 1.4 | - | 0.03 | 0.03 | 360 | 460 | |
| X56 | 0.26 | 1.1 | - | 0.03 | 0.03 | 390 | 490 | |
| X60 | 0.26 | 1.4 | - | 0.03 | 0.03 | 415 | 520 | |
| X65 | 0.26 | 1.45 | - | 0.03 | 0.03 | 450 | 535 | |
| X70 | 0.26 | 1.65 | - | 0.03 | 0.03 | 585 | 570 | |