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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

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  • Tee
  • Reducer
  • Flange
  • Pipe Bend

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  • Donglin, Mengcun County, Cangzhou City, Hebei Province, China
  • +86 132 9342 5333
  • +8613293425333💬 chat
  • sale@chinahaihao.com
  • www.haihaohuadian.com

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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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323 articles

气站图.jpgIndustry news
Industry news

Nigeria HI Offshore Gas FID: Reading the Supply-Chain Signal Without Overclaiming

Shell's October 2025 FID on Nigeria's HI offshore gas development signals a potential uptick in deep-water piping demand. This article explains what is known, what remains unverified, and how EPC buyers can prepare without overclaiming.

Aug 26, 20265 min readHebei Haihao Group
碳钢弯头.jpgBuyer guide
Buyer guide

Carbon Steel vs Stainless Pipe Schedules: How Buyers Prevent Wall-Thickness Errors

Carbon and stainless pipe schedules are not interchangeable. Compare ASME B36.10M vs B36.19M and use RFQ and inspection checks to prevent wall-thickness errors.

Aug 25, 20266 min readHebei Haihao Group
p01_008_f7212ee78ca720b028744b9aa1406a79.jpgStandards
Standards

ASME B16.20 Metallic Gaskets: Types and Flange Compatibility

ASME B16.20 defines dimensions, materials, and tolerances for metal ring-joint, spiral-wound, and metal-jacketed gaskets. This guide explains the standard's scope, flange compatibility, and procurement checks for EPC buyers.

Aug 24, 20266 min readHebei Haihao Group
S形弯管.jpgTechnical
Technical

ASME B16.49 Induction Bend Inspection and Procurement Guide

Understand the scope of ASME B16.49 for factory-made induction bends, what to check during procurement and inspection, and what to verify when the standard does not apply.

Aug 23, 20265 min readHebei Haihao Group
水冷壁.JPGCase studies
Case studies

Iraq GGIP: A Multi-Energy Piping and Water-System Project Reference

Explore the Gas Growth Integrated Project (GGIP) in Iraq—a multi-energy initiative by TotalEnergies, Basrah Oil Company, and QatarEnergy. This reference covers project scope, procurement considerations for piping and water systems, and key checks for EPC engineers and buyers.

Aug 22, 20266 min readHebei Haihao Group
化工厂.jpgIndustry news
Industry news

Bonga North Investment and Stake Changes: What the Official Shell Updates Confirm

Shell's December 2024 investment decision for Bonga North and its 2025 agreement to increase its interest in OML 118 are key updates for EPC suppliers. This article clarifies what is confirmed, what remains to be verified, and how buyers can align their piping procurement strategies with deep-water project developments.

Aug 21, 20266 min readHebei Haihao Group
8字盲板 (2).jpgBuyer guide
Buyer guide

Metallic vs Nonmetallic Flange Gaskets: ASME RFQ Guide

Compare ASME B16.20 metallic and B16.21 nonmetallic flat gaskets, and clarify what each standard actually covers before you issue an RFQ.

Aug 20, 20266 min readHebei Haihao Group
锻三通11.jpgStandards
Standards

ASME B16.11 Forged Fittings: Socket-Weld and Threaded Classes

ASME B16.11 defines Class 2000, 3000, 6000 for threaded fittings and Class 3000, 6000, 9000 for socket-weld fittings. This guide explains what these classes mean, how to specify them, and what to verify when procuring forged fittings.

Aug 19, 20266 min readHebei Haihao Group
全图片.JPGTechnical
Technical

ASME B16.52 Nonferrous Forged Fittings and Copper Alloy Checks

Understand the difference between ASME B16.52 for nonferrous forged fittings and ASTM B283/B283M for copper alloy die forgings, plus RFQ and inspection guidance.

Aug 18, 20266 min readHebei Haihao Group
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