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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

Company

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Contact

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

Global delivery

· Shipping to projects in

Middle East

🇸🇦SAU🇦🇪ARE🇶🇦QAT🇰🇼KWT🇴🇲OMN🇮🇶IRQ🇹🇷TUR

CIS

🇷🇺RUS🇰🇿KAZ

Europe

🇩🇪DEU🇫🇷FRA🇮🇹ITA🇪🇸ESP🇬🇧GBR🇳🇱NLD

SE Asia

🇮🇩IDN🇲🇾MYS🇸🇬SGP🇻🇳VNM

East Asia

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South Asia

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Americas

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Africa

🇪🇬EGY🇿🇦ZAF

Oceania

🇦🇺AUS🇳🇿NZL

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PrivacyTermsEstablished 1982 · Mengcun, Hebei, China

Insights

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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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18 articles· Technical

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Procurement Guide for Figure 8 Blanks (Spectacle Blinds): Specifications, Quality Checks & RFQ Tips

A practical guide for engineers and buyers on sourcing figure 8 blinds (spectacle blinds). Learn key standards, material selection, inspection requirements, and RFQ checklist to ensure quality and compliance.

Jun 10, 20267 min readHebei Haihao Group
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Hydrogen Induced Cracking HIC Mechanism and HIC-Resistant Steel

How hydrogen induced cracking forms in pipeline steels, what NACE TM0284 measures and how to specify HIC-resistant pipe and fittings for sour service.

Jun 7, 20268 min readHebei Haihao Group
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Hardness Conversion HV HRC HBW with NACE MR0175 Ceiling

Understand HV, HRC and HBW hardness conversion per ASTM E140 and how the NACE MR0175 22 HRC ceiling applies to carbon steel pipe fittings.

Jun 5, 20266 min readHebei Haihao Group
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Monel 400 and K-500 Pipe Fittings for Marine Saltwater Service

How to specify Monel 400 and Monel K-500 pipe fittings for seawater and marine service, including chemistry, pitting behaviour and procurement checklist.

Jun 3, 20267 min readHebei Haihao Group
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Titanium Grade 2 and Grade 12 Fittings for Chloride Service

Why titanium Grade 2 and Grade 12 buttweld fittings dominate chloride and seawater service, and how to specify them under ASME B31.3 piping codes.

Jun 1, 20267 min readHebei Haihao Group
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Technical

ASTM A350 LF3 Chinese Equivalent: Why Buyers Should Not Match by Grade Name Alone

A buyer guide for A350 LF3 low-temperature forgings and Chinese-equivalent questions: compare chemistry, mechanical properties, impact temperature and project approval, not just grade names.

Jun 1, 20266 min readHebei Haihao Group
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Technical

9% Nickel Steel Pipe and Fittings for Cryogenic LNG Service

How 9% nickel steel grades to ASTM A553 Type I and matching pipe to A333 Gr 8 enable LNG and cryogenic piping down to -196 degC, with buyer guidance.

May 30, 20268 min readHebei Haihao Group
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Technical

Hastelloy C-276 vs C-22 Pipe Fittings: Service and Welding

Compare Hastelloy C-276 and C-22 pipe fittings on chromium content, pitting resistance, wet chlorine performance and weld metallurgy for procurement engineers.

May 28, 20267 min readHebei Haihao Group
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Technical

GB Pressure Piping RT Percentage: How to Specify NDT Without Guessing

A practical buyer guide for GB pressure piping RT percentage questions: why there is no universal number, what documents to request, and how to write NDT requirements in an RFQ.

May 27, 20267 min readHebei Haihao Group
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