Finding differentiation in these materials can be difficult because there are more similarities than differences, but they do have some differences that buyers should take into consideration. For NPS 14 to NPS 22 (DN 350-550), schedule 10S; b. NPS 12 of Schedule 40S c. NPS 10 and 12 of schedule 80S. Welded Copper vs Press-Fit Stainless Steel Copper is generally perceived as the industry standard for piping given its long and distinguished history, so you might be surprised to know that newer forms of technology like stainless steel pipe fittings are superior in a number of ways. 91-22-43449300 Singapore, Singapore A2 Pipe and Plumbing Fittings Brass Pipes - Stainless Steel Tubes Most standard 316 grade of stainless steel have a maximum of 0.08% carbon and are suitable for use in non-welded parts and equipment; in case of welded applications these parts are used for light gauge application. STEEL PRODUCTS; CONCRETE PRODUCTS; BUILDING MATERIALS; INSULATION; PAINTS; TOOLS & SAFETY ; PIPES