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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

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  • Elbow
  • Tee
  • Reducer
  • Flange
  • Pipe Bend

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  • Donglin, Mengcun County, Cangzhou City, Hebei Province, China
  • +86 132 9342 5333
  • +8613293425333💬 chat
  • haihaojituan@163.com
  • www.haihaohuadian.com

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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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312 articles

万能拉力机.JPGBuyer guide
Buyer guide

NPT Threaded Fitting Inspection: B1.20.1 Gauging and RFQ Controls

Learn how to inspect NPT threaded fittings per ASME B1.20.1 and B16.11, including gauging, RFQ inputs, and documentation checks for EPC buyers.

Sep 29, 20266 min readHebei Haihao Group
水暖管件.jpgStandards
Standards

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.

Sep 28, 20265 min readHebei Haihao Group
法兰管件图.jpgTechnical
Technical

ASTM A960 Wrought Fitting Requirements: What Buyers Must Know

ASTM A960 sets common requirements for wrought steel pipe fittings covered by individual ASTM product specs like A234. This guide explains what buyers must verify when ordering and inspecting fittings.

Sep 27, 20265 min readHebei Haihao Group
万能拉力机.jpgCase studies
Case studies

Sparta High-Pressure Deepwater Development: A Procurement Risk Reference

Shell's Sparta project in the U.S. Gulf of Mexico exemplifies the extreme demands of high-pressure deepwater developments. This case study outlines procurement risks and verification steps for EPC engineers and buyers, without claiming any involvement by Hebei Haihao Group.

Sep 26, 20266 min readHebei Haihao Group
法兰管件图.jpgIndustry news
Industry news

Hammerhead FID: Guyana's Seventh Offshore Development in the Official Record

ExxonMobil has taken FID on the Hammerhead project offshore Guyana, the seventh development on the Stabroek block. With a capacity of 150,000 bopd and a $6.8 billion investment, production is expected in 2029. This article outlines the key facts and procurement implications for piping suppliers.

Sep 25, 20265 min readHebei Haihao Group
化工厂.jpgBuyer guide
Buyer guide

ASME B31.1 Replacement Piping Spools: A Component Specification Guide

Specifying replacement piping spools for power plants requires careful alignment with ASME B31.1 and B16.9. This guide covers key procurement checks, RFQ inputs, and inspection points to ensure code compliance and safe operation.

Sep 24, 20266 min readHebei Haihao Group
水暖管件.jpgStandards
Standards

ASME B16.3 Malleable Iron Threaded Fittings: Scope and Classes

ASME B16.3 covers malleable iron threaded fittings in Classes 150 and 300, including ratings, dimensions, threading, and coatings. This guide explains the standard's scope, key requirements, and procurement checks for EPC engineers and buyers.

Sep 23, 20266 min readHebei Haihao Group
CS弯头.jpgTechnical
Technical

Steel Forging Traceability Checks Under ASTM A961

How to verify heat identity, heat analysis vs product analysis, mechanical test evidence, and RFQ requirements when buying forged flanges to ASTM A961 and A105.

Sep 22, 20266 min readHebei Haihao Group
6米立车.JPGCase studies
Case studies

Whale Starts Production: A Standardized Deepwater Design Reference

Shell's Whale project in the U.S. Gulf of Mexico began production in January 2025, showcasing a standardized design approach. This case study explores the implications for EPC engineers and procurement managers, focusing on how standardization can influence piping system procurement and project execution.

Sep 21, 20266 min readHebei Haihao Group
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