1) Standard: ASTM A252

2) Grade: Gr.1, Gr.2, Gr.3

3) Out Diameter: 21mm (0.8 inch)-610mm (24 inch)

4) Wall thickness: 1mm (0.04 inch)-14mm ( 0.55 inch)

5) Length: Fixed length, random length, as per customer’s requirement.

6) All the production technical will be done strictly according to API 5L, ASTM A252 standard and ISO 9001:2008.

7) OD tolerance: ±1.0%D

8) WT tolerance: ≤-12.5%t

9) Length tolerance: 0-20mm

10) Straightness: Total length≤0.2%L

11) Outer bur: Basicly parallel with the parent metal

12) The steel shall be made by one or more of the following process: open-hearth, basic-oxygen, or electric-furnace.

13) Chemical Composition: The steel shall contain no more than 0.050% phosphorous.

14) Mechanical properties:

15) All the related commercial and technical documents will be issued timely.