API 5L Gr.B Seamless Carbon Steel Pipe/Chinese Manufacturer

1. API 5L Gr.B seamless carbon steel pipe

2. Standard&material: DIN2391-2 ST52, EN10305-1 E355, C45E, 34CrMo4, 42CrMo4, ASTM A519 SAE1020, SAE1026, SAE1045, SAE4130, SAE4140, etc. 

3. Size range: 50mm*40mm - 480mm*420mm 

4. Manufacture method: Cold rolled, cold drawn 

5. Treatment method of internal surface: Honed 

6. Delivery condition: BK, BKW, BKS, GBK, NBK. 

7. Tolerance of ID: H7, H8, H9, H10 

8. Tolerance of W. T: +/-5% 

9. Roughness of internal surface: 0.35um max. 

10.Straightness of tubes: 0.5mm/1000mm, 0.8mm/1000mm, 1mm/1000mm according to length of tubes required. 

11. Packing: In bundles tied with steel strips. Slightly internal&external oil coating for anti-rust protection. End plastic caps covering both ends.

0ur company invested 10 million RMB in two cold drawing lines, one is 200 tons and the other is 320 tons with acid cleaning, phosphatization , heat treatment and alignment cutting. These two lines can process various seamless tubes range from diameter 40mm to 400 mm. They can improve our production efficiency and can supply cold drawn tubes to other machinery companies.

     JLB300 High Precision Hydraulic Cold Drawing Machine can be made into a chain machine set according to customer's requirements. The pull of this machine set ranges from 5T to 300T,and it's drawing length can reach 200 meters. It is widely applied to draw copper, aluminium, steel and other materials, expecially low-cost and extra-long pipe products. It's advantage lies in precision of cold drawing, adjustable speed, automatic charging and blanking, and optional online cutting and automatic length-fixed cutting.

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