Tianjin nolite steel is specialized in producing high-tech erw (electric resistance welded) and ssaw (spiral submerged arc welded) pipes. we also have another three associated factories for lsaw and smls in china. main products range: 1. erw steel pipe: od 1/2 -24 inch (21.3-610mm) 2. ssaw steel pipe: od 8 -120 inch (219.1-3048mm) 3. lsaw steel pipe: od 8 - 72 inch (219.1-1820mm) 4. seamless steel pipe: od 1/8 - 30 inch (10.3-762mm) 5. galvanized steel pipe: od 1/2 - 24 inch (21.3-610mm) our company produces different types of erw and ssaw steel pipe 600,000 tons annual, including casing pipes for exploration of oil and gas, oil and gas transmission pipes, fluid transportation and structural pipes based on the domestic standards of gb/t9711, gb/t3091, gb/t13793, sy/t5768, sy/t5037 and sy/t5040, and international standards of api spec 5ct, api spec 5l psl2, astm a53, astm a252, en 10217, en 10219, and other related standards. all these steel pipes are suitable for the industries of oil, natural gas, ship building, chemical, environmental protection, boiler, water conservancy, electrical industry, steel structure, building and other related fields.