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Tehnički članci, poređenja standarda, studije slučaja i vodiči za kupovinu o komponentama cevovoda pod pritiskom, prirubnicama i kovanim fitinzima.

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不锈钢管.jpgTehnika
Tehnika

Weld Repair Acceptance for Wrought Steel Fittings

Weld repair acceptance for A234 and other wrought steel fittings is governed by the product specification, A960/A960M common requirements, and the purchase order — not by a generic visual pass/fail rule. Here's what to verify.

6. okt 2026.8 minHebei Haihao Group
水暖管件.jpgStandardi
Standardi

ASME B16.39 Malleable Iron Pipe Unions: Classes and Tests

ASME B16.39 covers threaded malleable iron unions in Classes 150, 250, and 300, including design, ratings, materials, threads, and tests. This guide explains what EPC engineers and procurement managers must verify when specifying these unions.

2. okt 2026.5 minHebei Haihao Group