سرویس خوب astm a312 با قدرت بالا
ASTM A312-A312M-2022a : Designation: A312/A312M − 22a Used in USDOE-NE standardsStandard Specif i cation forSeamless, Welded, and Heavily Cold Worked AusteniticStainless Steel Pipes 1This standard is issued under the f i xed designation A312/A312M; the number immediately following the designation indicates the yearof …