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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
  • 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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108 articles· Buyer guide

管件总图.jpgBuyer guide
Buyer guide

Buttweld Spool Fit-Up: Coordinating ASME B16.9 Fittings and B16.25 Ends

Learn how to coordinate ASME B16.9 fittings with B16.25 bevel ends for reliable buttweld spool fit-up. Includes procurement checks, inspection points, and common risks.

Sep 9, 20266 min readHebei Haihao Group
中频弯管机.jpgBuyer guide
Buyer guide

Valve End Connections and Mating Flanges: A B16.34 and B16.5 Buying Guide

Understand how ASME B16.34 and B16.5 interact for valve-to-flange compatibility. Learn key procurement checks, RFQ inputs, and inspection points to avoid mismatches.

Sep 4, 20266 min readHebei Haihao Group
p01_003_011d8f3f6eb1f9fa4bca7f3145ecdfad.pngBuyer guide
Buyer guide

Matching ASME B16.11 Forged Fittings to Pipe Size and Schedule

Learn how to correctly match ASME B16.11 forged fittings to pipe size and schedule. Understand the relationship between fitting class and pipe schedule, and get practical procurement and inspection tips.

Aug 30, 20266 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
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
p01_010_343936e3e2eaef1d3c6a0d2cf0887ddb.jpgBuyer guide
Buyer guide

ASME B16.10 Valve Face-to-Face Dimensions: An RFQ Checklist

Use this RFQ checklist to specify ASME B16.10 valve face-to-face dimensions correctly and avoid installation mismatches in your piping system.

Aug 15, 20267 min readHebei Haihao Group
中低压管件法兰 vs. 对焊管件法兰:如何选择?Buyer guide
Buyer guide

Low/Medium Pressure Flanges vs. Weld Neck Flanges: A Procurement Guide for EPC Buyers

Choosing between low/medium pressure flanges and weld neck flanges depends on system pressure, temperature, and application. This guide covers key differences, standards, inspection requirements, and RFQ best practices for global procurement professionals.

Jul 24, 20265 min readHebei Haihao Group
了解不锈钢法兰的特点和应用Buyer guide
Buyer guide

Procurement Guide for Stainless Steel Flanges: Key Features, Applications, and Selection Tips

Stainless steel flanges are critical for piping systems in demanding industries. This guide covers standards, inspection documents, RFQ essentials, and quality risks to help procurement engineers make informed decisions.

Jul 24, 20266 min readHebei Haihao Group
为何选择海浩高压法兰管件集团有限公司Buyer guide
Buyer guide

How to Source High-Pressure Flanges for EPC Projects: A Procurement Guide

A practical guide for EPC procurement engineers on sourcing high-pressure flanges, covering standards, inspection documents, RFQ checklist, quality risks, and pre-quotation information.

Jul 23, 20265 min readHebei Haihao Group
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