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Hebei Haihao Group Huadian High Pressure Pipe Fittings Co., Ltd.
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Hebei Haihao Group Huadian High Pressure Pipe Fittings Co., Ltd.Hebei Haihao Group Huadian High Pressure Pipe Fittings Co., Ltd.Pressure Pipe Fittings · Flanges · Factory Direct

Since 1982. Pressure piping component manufacturer covering elbows, flanges, tees, reducers and project supply.

ISO 9001 quality system · ABS Type Approval · safety-registered manufacturer

Products

  • Elbow
  • Tee
  • Reducer
  • Flange
  • Pipe Bend

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Contact

  • Donglin, Mengcun County, Cangzhou City, Hebei Province, China
  • +86 132 9342 5333
  • haihaojituan@163.com
  • www.haihaohuadian.com

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PrivacyTermsEstablished 1982 · Mengcun, Hebei, China

Insights

Insights & Knowledge Center

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

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159 articles

全图片.JPGTechnical
Technical

Normalizing vs Quench and Temper for Buttweld Fittings

When to specify normalizing, normalizing and tempering, or quench and temper for ASTM A234 and A420 buttweld pipe fittings on EPC projects.

May 22, 20267 min readHebei Haihao Group
6米立车.JPGCase studies
Case studies

Mozambique Coral South FLNG Cryogenic Equipment Reference

Coral Sul FLNG offshore Mozambique relies on AP-DMR cryogenic technology and twin coil-wound heat exchangers. Reference scope for cold-service procurement.

May 21, 20269 min readHebei Haihao Group
万能拉力机.JPGBuyer guide
Buyer guide

Third-Party Inspection RFP: SGS, BV, TUV, DNV, Intertek Compared

How to write a third-party inspection RFP for pipe fittings sourcing from China and compare SGS, Bureau Veritas, TUV, DNV and Intertek capabilities.

May 21, 202610 min readHebei Haihao Group
8字盲板 (2).jpgStandards
Standards

API 6A Wellhead Flanges vs ANSI ASME B16.5 Flanges Guide

API 6A wellhead flanges vs ANSI ASME B16.5 flanges: pressure ratings, RTJ requirement, material classes, PSL levels and where they overlap for buyers.

May 20, 20267 min readHebei Haihao Group
碳钢弯头.jpgTechnical
Technical

Carbon Equivalent CEV Calculation Explained for Pipe Buyers

Understand the IIW carbon equivalent CEV formula, why it controls weldability, and how to use it when buying carbon and low-alloy pipe and fittings.

May 20, 20266 min readHebei Haihao Group
气站图.jpgCase studies
Case studies

ADNOC Hail and Ghasha Sour Gas Megaproject Reference

ADNOC's Hail and Ghasha sour gas development locks in roughly USD 17 billion of EPC. Reference for sour service materials and Abu Dhabi sourcing.

May 19, 202610 min readHebei Haihao Group
锻造.JPGBuyer guide
Buyer guide

MTC Review Checklist for Buyers: EN 10204 3.1 and 3.2 Audit

How international buyers should review a Mill Test Certificate before approving shipment, including EN 10204 3.1 vs 3.2 differences and red flags.

May 19, 20269 min readHebei Haihao Group
法兰.jpgStandards
Standards

ASME B16.34 Valve Flange Standard Explained for Buyers

What every EPC buyer should know about ASME B16.34: pressure classes, material groups, derating with temperature and procurement specification points.

May 18, 20267 min readHebei Haihao Group
全图片.JPGTechnical
Technical

ASTM A350 LF2 vs LF3 vs LF6 Low Temperature Flange Guide

Compare ASTM A350 LF2, LF3 and LF6 forged flanges by impact test temperature, chemistry and best-fit service for cold and cryogenic piping projects.

May 18, 20268 min readHebei Haihao Group
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