Cangzhou Zhongrun Steel Pipe Co., Ltd., founded in 1994, is located in the beautiful coastal city - Changzhou.The main products:seamless steel pipe,ERW,LSAW,SSAW and Alloy steel pipe,annual sales of 100,000 tons.
In 2012 my company invested Hengchang Steel Pipe Manufacturing Co., Ltd.in Cangzhou City, the company covers an area of 100 acres, a total of eight pipe production line,annual production of about 40,000 tons.
My company to provide you with quality products and dedicated service, welcome to visit our company.
| Production | API 5L PSL1 PSL2 SSAW steel pipe |
| Process of manufacture | As-rolled,Heat-treated |
| Delivery condition | As-rolled,normalized, thermomechanical,tempered,quenched |
| Type of length | Fixed ruler and Double ruler |
| Inspection and Test | Tensile test,Hydrostatic test,CVN impact test,Non-destructive inspection and as agreed |
API 5L PSL1 SSAW Chemical Composition
| Pipe/Steel grade | C(%)≤ | Mn(%)≤ | P(%)≥ | P(%)≤ | S(%)≤ | V(%)≤ | Nb(%)≤ | Ti(%)≤ |
| L175/A25 | 0.21 | 0.6 | 0.03 | 0.03 | ||||
| L175P/A25P | 0.21 | 0.6 | 0.045 | 0.08 | 0.03 | |||
| L210/A | 0.22 | 0.9 | 0.03 | 0.03 | ||||
| L245/B | 0.26 | 1.2 | 0.03 | 0.03 | c,d | c,d | d | |
| L290/X42 | 0.26 | 1.3 | 0.03 | 0.03 | d | d | d | |
| L320/X46 | 0.26 | 1.4 | 0.03 | 0.03 | d | d | d | |
| L360/X52 | 0.26 | 1.4 | 0.03 | 0.03 | d | d | d | |
| L390/X56 | 0.26 | 1.4 | 0.03 | 0.03 | d | d | d | |
| L415/X60 | 0.26 | 1.4 | 0.03 | 0.03 | f | f | f | |
| L450/X65 | 0.26 | 1.45 | 0.03 | 0.03 | f | f | f | |
| L485/X70 | 0.26 | 1.65 | 0.03 | 0.03 | f | f | f | |
| a.Cu≤0.5%;Ni≤0.5%;Cr≤0.5% and Mo≤0.15% | ||||||||
| c.Unless otherwise agreed,Nb+V≤0.06% | ||||||||
| d.Nb+VT+Ti≤0.15% | ||||||||
| f.Unless otherwise agreed,Nb+V+Ti≤0.15% | ||||||||
| g.No deliberate addition of B is permitted and the residual B≤0.001% | ||||||||
API 5L PSL2 SSAW Chemical Composition
| Pipe/Steel grade | C(%)≤ | Si(%)≤ | Mn(%)≤ | P(%)≤ | S(%)≤ | V(%)≤ | Nb(%)≤ | Ti(%)≤ | CEiiw(%)≤ | CEpcm(%)≤ |
| L245/B | 0.24 | 0.45 | 1.4 | 0.025 | 0.015 | 0.05 | 0.05 | 0.04 | 0.43 | |
| L290/X42 | 0.24 | 0.45 | 1.4 | 0.025 | 0.015 | 0.06 | 0.05 | 0.04 | 0.43 | |
| L320/X46 | 0.24 | 0.45 | 1.4 | 0.025 | 0.015 | 0.07 | 0.05 | 0.04 | 0.43 | |
| L360/X52 | 0.24 | 0.45 | 1.5 | 0.025 | 0.015 | 0.1 | 0.05 | 0.04 | 0.43 | |
| L390/X56 | 0.24 | 0.45 | 1.5 | 0.025 | 0.015 | 0.1 | 0.05 | 0.04 | 0.43 | |
| L415/X60 | 0.24 | 0.45 | 1.7 | 0.025 | 0.015 | 0.1 | 0.05 | 0.04 | 0.25 | |
| L450/X65 | 0.18 | 0.45 | 1.7 | 0.025 | 0.015 | g | g | g | 0.25 | |
| L485/X70 | 0.18 | 0.45 | 1.8 | 0.025 | 0.015 | g | g | g | 0.25 | |
| L555/X80 | 0.18 | 0.45 | 1.9 | 0.025 | 0.015 | g | g | g | 0.25 | |
| L625/X90 | 0.16 | 0.55 | 2.1 | 0.02 | 0.01 | g | g | g | 0.25 | |
| L690/X100 | 0.16 | 0.55 | 2.1 | 0.02 | 0.01 | g | g | g | 0.25 | |
| L830/X120 | 0.1 | 0.55 | 2.1 | 0.02 | 0.01 | g | g | g | 0.25 | |
| a.The CEiiw limits apply if C>0.12% and the CEpcm limits apply if C≤0.12% | ||||||||||
| g.Unless otherwise agreed,Nb+V+Ti≤0.15% | ||||||||||
Tensile Properties
| Pipe/Steel grade | Yield strength(Mpa) | Tensile strength(Mpa) | ||
| minimum | maximum | minimum | maximum | |
| L245/B | 245 | 450 | 415 | 655 |
| L290/X42 | 290 | 495 | 415 | 655 |
| L320/X46 | 320 | 525 | 435 | 655 |
| L360/X52 | 360 | 530 | 460 | 760 |
| L390/X56 | 390 | 545 | 490 | 760 |
| L415/X60 | 415 | 565 | 520 | 760 |
| L450/X65 | 450 | 600 | 535 | 760 |
| L485/X70 | 485 | 635 | 570 | 760 |
| L555/X80 | 555 | 705 | 625 | 825 |
| L625/X90 | 625 | 775 | 695 | 915 |
| L690/X100 | 690 | 840 | 760 | 990 |
| L830/X120 | 830 | 1050 | 915 | 1145 |
SSAW Pipes Manufacturing Process
External corrosion process
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