Product Name | Carbon Seamless Steel Pipe |
Standard | BS, JIS, GB, DIN, ASTM, API, BS EN10219, BS EN10217, JIS G3454-2007, JIS G3445-2006, JIS G3444-2006, GB/T 8163-1999, GB/T 8162-1999, DIN 1626, DIN 17175, ASTM A106-2006, ASTM A53-2007, ASME B36.19M-2004, ASME B36.19M-1985, API 5CT, API 5L etc |
Grade | S20C,S40C,16mn, A53-A369 10#, 20#, 45#, 15crmo, 12Cr1MoV, 10CRMO910, Cr5Mo, 30CrMo, 16mn, A53(A,B), A106(B,C) Q235, Q345,Gr.A&B, X42, X46, X52, X56, X60, X65, X70, X80, J55, K55 ,L80, N80, P110,. St35.8, St44 ,St52, 20Mn2 ,10, 20,35,45, 16Mn,Q345,20G,20MnG, 25MnG,15CrMoG,12Cr1MoVG, J55,K55,N80,P110,T1,T5,T11,T22,T23,and so on |
Certificates | ISO API SGS BV etc |
Outside Diameter | 1/2'--28' |
20mm-710mm | |
Thickness | SCH5S, SCH10S, SCH20S,SCH20, SCH30,STD, SCH40, SCH60, SCH80, SCH100, SCH140, SCH160,XS,XXS. |
1mm-80mm | |
Length | 5.8m 6m Fixed, 12m Fixed, 2-12m Random. |
Surface Treatment | Black Painted, Galvanized, Natural, Anticorrosive 3PE coated,polyurethane foam Insulation etc . |
Packing | Bundles or In bulk. bundled pipes with two slings at the both end for easy loading and discharging, |
Delivery Time | Less Than 15/20/25/30/40/50/60 Days According To The Quantity |
Usage /Application | Oil pipe line, Drill pipe, Hydraulic pipe, Gas pipe, Fluid pipe,Boiler pipe,Conduit pipe, Motorcycle accessories, car parts,Scaffolding pipe pharmaceutical and ship building etc. |
Payment term | L/C, T/T , ETC. |
Delivery Condition | BK.BKW.BKS.NBK. |
Delivery Term | FOB, CIF, FCA, EXW etc |
Brand | XL-ZGL |
LIAOCHENG XINGLONG SEAMLESS TUBE MANUFACTURING CO.,LTD |
steel grade&material:carbon steel.welded steel pipe stainless steel
Manufacturing Process | Tube ID | Length | Straightness | Dimensional Accuracy | Tolerance on ID | Inner Bore Roughness |
honing | Φ40-800mm | ≤13m | 0.2-0.3mm | H8~H9 | ±8% | <=0.8 um |
grade | C | Si | Mn | P | S | Cr | Ni | Cu | V | Al |
1020 | 0.17-0.23 | 0.17-0.37 | 0.35-0.65 | <=0.035 | <=0.035 | <=0.25 | <=0.30 | <=0.25 | - | - |
C45 | 0.42-0.50 | 0.17-0.37 | 0.50-0.80 | <=0.035 | <=0.035 | <=0.25 | <=0.30 | <=0.25 | - | - |
16Mn | 0.13-0.19 | 0.20-0.60 | 1.20-1.60 | <=0.030 | <=0.030 | <=0.030 | <=0.30 | <=0.25 | - | - |
27SiMn | 0.24-0.32 | 1.10-1.40 | 1.10-1.40 | <=0.035 | <=0.035 | <=0.30 | <=0.30 | <=0.20 | - | - |
ST52 | <=0.20 | <=0.50 | <=1.70 | <=0.035 | <=0.035 | <=0.30 | <=0.50 | <=0.30 | <=0.15 | - |
ST52.3 | <=0.18 | <=0.50 | <=1.70 | <=0.030 | <=0.25 | <=0.30 | <=0.50 | <=0.30 | <=0.15 | ≥0.015 |
Grade | Cold finished (hard) (BK) | Cold finished (hard) (BK+S) | Hardness | Impact Value (-20°C) J | |||
T.S bN/mm2 | Elongation 85% | T.S bN/mm2 | Y.S SN/mm2 | Elongation 85% | |||
1020 | ≥550 | ≥8 | ≥520 | ≥400 | ≥15 | 170 | -- |
C45 | ≥680 | ≥5 | ≥630 | ≥520 | ≥12 | 190 | -- |
16Mn | ≥640 | ≥5 | ≥600 | ≥520 | ≥14 | 160 | -- |
27SiMn | ≥780 | ≥5 | ≥700 | ≥580 | ≥10 | 220 | -- |
ST52 | ≥660 | ≥8 | ≥620 | ≥520 | ≥15 | 190 | -- |
ST52.3 | ≥660 | ≥8 | ≥620 | ≥520 | ≥15 | 190 | ≥27 |
ID size | ID Tolerance | WT Tolerance | ||||
H7 | H8 | H9 | H10 | H11 | ||
30 | +0.0210 | +0.0330 | +0.0520 | +0.0840 | +0.1300 | ±5% |
>30-50 | +0.0250 | +0.0390 | +0.0620 | +0.1000 | +0.1600 | |
>50-80 | +0.0300 | +0.0460 | +0.0740 | +0.1200 | +0.1900 | |
>80-120 | +0.0350 | +0.0540 | +0.0870 | +0.1400 | +0.2200 | |
>120-180 | +0.0400 | +0.0630 | +0.1000 | +0.1600 | +0.2500 | |
>180-250 | +0.0460 | +0.072 | +0.1150 | +0.1850 | +0.2900 | |
>250-315 | +0.0520 | +0.0810 | +0.1300 | +0.2100 | +0.3200 | |
>315-800 | +0.0570 | +0.0890 | +0.1400 | +0.2300 | +0.3600 |
OD | Tolerance | OD | Tolerance |
≤Φ40 | ±0.15 | Φ160~200 | ±0.80 |
Φ40~60 | ±0.25 | Φ200~240 | ±1.00 |
Φ60~80 | ±0.30 | Φ240~340 | ±1.50 |
Φ80~100 | ±0.40 | Φ340~440 | ±2.00 |
Φ100~160 | ±0.50 | Φ440~520 | ±2.50 |






Liaocheng Xinglong Seamless pipe Manufacturing C0., Ltd. has equipped 60, 90, 140,325ASSEL mill lines. Production specification covers 20mm-710mm*2mm-100mm. The full capacity is above 600 thousand tons. The 325ASSEL tube rolling mill the domestic largest 3-roller mil at present. Adopting world advanced 3-roller tube rolling mill with quick-start roller and Grade-3 computer automatic control system, it ensures production precision efficiently, gets high reputation among experts i steel tube industry and ills the domestic gap greatly.
There are over 60,000 tons stock products, running specifications more than 3,000 kinds. Our production range: Outer Diameter: 20mm-710mm, Wall Thickness :2mm-100mm. The materials of the products are as follows:
10#,20# ,35#, 45#, 16Mn,27SiMn, ST44 ,ST52, x42, x52,15CrMo, 30CrMo,34CrMo4, 12Cr1MoV, J55, K55, N80, L80, P110 etc. Standards: Gb8162-2008, Gb8163-2008, Gb3087-2008, Gb5310-1995, Gb6479-2000,ASTM A53, ASTM A106, API 5L ,API 5CT , DIN , JIS etc.
Our company has equipped with sophisticated manufacturing and testing equipment.
We has its own R&D team who has developed the intellectual property rights for key technologies and launched a big amount series new products. The R&D department has combined with several research Institutes and Colleges, and engaged Senior Researcher of Steel Pipe Industry as consultants. At the same time the Quality Inspection Department of our factory cooperated with the Liaocheng Quality Inspection Bureau to sharing the resource of talents, testing equipment and Technology.
And Our Quality Inspection Department has the kinds of the development expriments and inspection equipment such as Hydraulic universal tester, Optical Spectrometer, High and Low-Power microscope, Sample making machine, Metallographic Analysis,Projector and Infrared temperature etc.
The synthetic Science Building integrated with Research, Technology Innovation and Quality supervision has been built up and put into use. With the word-class experiment equipment, strong R&D team and abundant technology.
These equipment and technologies guarantee that the production and testing processes are up to relevant standards. So the products can satisfy the requirements of clients doubtlessly.
Our products far exported to Korea, Indian , Malaysia, Canada, Iran, Brazil, Pakistan, Turkey and the other Middle east countries. Our products are widely used in Petroleum, chemical industry, Electrical Power, Coal, Machinery, Low and high -pressure boiler, hydraulic prop and so on..
Adhering to the operation principle of " Faith First, Clients Uppermost", high -quality products and complete after-sale service with the lowest price will be supplied as we always do. We sincerely hope to establish long -term cooperation relationship with you on the basis of mutual benefit, reciprocity and common development.



FAQ
Q:Are you a manufacturer?
A:Yes, we are manufacturer.
Q:Where is your Factory?
A:In Liaocheng City, nearest airport Jinan.
Q:Do you have Certificates?
A:Yes, we have ISO and API Certificates.
Q:What is your annual output?
A:400,000 metric ton per year.
Q:What is your capacity of dimension?
A:OD 12-610MM, WT 2-100MM
Q:What is your delivery time?
A:5-30 days, according to stock or new production.
Q: What is your Material?
A:Carbon and alloy steel pipe, Gr.b, 20#, CK45, ST52, AISI4140, 40Cr, 42Crmo and so on.
Q:What is your standard?
A:ISO, API, ASTM, JIS, DIN GB and so on.