astm a312 تضمینی با کیفیت بالا و بهترین قیمت
ASTM A312 Stainless Steel Pipe Specification. ASTM A312 stainless steel pipe sizes and dimensions should conform to ANSI B36.19, nominal pipe size (NPS) ranges from NPS 1/8 [10.29 mm] to NPS 30 [762 mm], Schedule number for wall thickness from Sch 5s to …