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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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332 articles

水暖管件.jpgStandards
Standards

ASME B16.1 Gray Iron Flanges: Classes 25, 125 and 250

ASME B16.1 covers gray iron flanges and flanged fittings in Classes 25, 125, and 250. This guide explains what the standard includes, how it differs from ductile iron (B16.42), and what buyers must verify when sourcing gray iron flanges.

Sep 17, 20266 min readHebei Haihao Group
八角垫环.jpgTechnical
Technical

ASME B16.21 Nonmetallic Flat Gasket Selection Guide

ASME B16.21 defines nonmetallic flat gaskets for pipe flanges. This guide explains the standard's scope, why you must pair it with the mating flange standard, and what to verify during procurement to avoid misapplication.

Sep 16, 20266 min readHebei Haihao Group
S形弯管.jpgStandards
Standards

ASME B16.49 Induction Bends: Scope and Procurement Guide

ASME B16.49 covers factory-made induction bends for transportation and distribution piping (B31.4, B31.8, B31.11). It is not for process or power piping. This guide explains scope, key requirements, and procurement checks.

Sep 12, 20266 min readHebei Haihao Group
化工厂.jpgCase studies
Case studies

Bacalhau Phase 1: A Deepwater Brazil FPSO Piping Reference

Equinor's Bacalhau Phase 1 in Brazil's Santos Basin is a landmark ultra-deepwater FPSO project. This reference guide for EPC engineers and procurement managers covers key facts, procurement considerations, and inspection points for piping systems in similar high-pressure, high-CO2 environments.

Sep 10, 20265 min readHebei Haihao Group