... of stainless steel pipes & tubes, including 201, 202, 301, 304, 316L, 2205 and so on.As regards to the product standard, 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 for Pharmacy ...