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Technical articles, standards comparisons, project case studies and buyer guides on pressure piping components, flanges and forged fittings.

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113 articles· Buyer guide

管件总图.jpgBuyer guide
Buyer guide

Pipe Fitting Manufacturing Record Book: Final Document Checklist

A manufacturing record book (MRB) is more than a single certificate. This guide explains how to assemble and verify the complete documentation package for wrought steel pipe fittings, covering standards, traceability, inspection, and release records.

Nov 4, 20266 min readHebei Haihao Group
管件总图.jpgBuyer guide
Buyer guide

Duplex Stainless Fitting RFQ Checklist: ASTM A815 and A923

Specifying duplex stainless fittings requires more than grade and size. This guide explains ASTM A815 fitting classes, ASTM A923 intermetallic phase testing, and the RFQ details EPC buyers must define to avoid costly mismatches.

Oct 29, 20265 min readHebei Haihao Group
万能拉力机.JPGBuyer guide
Buyer guide

NDT Personnel Certificate Review: Method, Level, Sector and Scope

Verifying NDT personnel certificates is more than checking a name and expiry date. This guide explains the key elements—method, level, sector, and scope—and highlights the differences between ISO 9712, ASNT 9712, ASNT NDT, and employer-based SNT-TC-1A certifications.

Oct 26, 20266 min readHebei Haihao Group
8字盲板 (2).jpgBuyer guide
Buyer guide

Metallic vs Nonmetallic Flange Gaskets: A Buyer Selection Guide

Choosing between metallic and nonmetallic flange gaskets requires more than a quick comparison. This guide explains the ASME standards that govern each family, the critical factors to evaluate, and the procurement checks that prevent costly joint failures.

Oct 20, 20265 min readHebei Haihao Group