... . pressure pipes, petroleum transmission pipes, petrolchemical industry pipes, liquid delivery pipe, water pipelines.3. milk transmission, sugar factory, dairy, sanitation, bathroom ... , we produce the stainless steel pipes & tubes in strict accordance with ASTM A249, A269, A270, A312, A554, DIN 11850 and so on. ASTM A270 Stainless Steel Pipes & Tubes ...