1. Standard: ASTM A252, SY/T5040, API 5L, EN10219, EN10217 
2. Outer diameter: 219 to 2, 540mm or 8 to 100 inches 
3. Wall thickness: 2.5 to 30mm or 0.098 to 1.181 inch 
4. Length: 11.8m or as demand 
5. Technique: Spiral Submerged Arc Welded 
6. Used for: Petroleum and natural gas industry, chemical industry, electrical industry, combustibles non-combustibles liquid transportation, and steel construction, drainage work and city construction and so on 
7. Delivery time: 45 days after we received the deposit or the L/C 
8. All the production process is made under the ISO 9001: 2008 strictly