Stainless Steel Butt-Weld Fittings and WN Flanges Manufactured by Haihao Group for High-Performance Industrial Applications
As one of China’s leading manufacturers of piping components, Haihao Group recently completed the production of a full range of stainless steel butt-weld fittings and weld neck (WN) flanges, manufactured according to ASME B16.9 and ASME B16.5 standards. The order was customized for a domestic industrial client, covering multiple sizes and configurations—all made from premium SS304 stainless steel.
This project reflects Haihao’s manufacturing capabilities in delivering standard-compliant, corrosion-resistant, and dimensionally precise pipe components for demanding applications.
Product Scope
The products manufactured in this batch are essential for assembling pipeline systems in sectors such as oil and gas, chemical processing, water treatment, and power generation. Each product was precisely machined, inspected, and surface protected according to project specifications.
ASME B16.9 Stainless Steel SS304 Tees
Butt-Weld Fittings (ASME B16.9):
90° Short Radius Elbows: For changing flow direction in limited-space systems
Equal Tees: For branching pipelines at 90° angles
Reducing Tees: For connecting branch lines with different diameters
Concentric Reducers: For reducing pipe diameter while maintaining center alignment
Weld Neck Flanges (ASME B16.5):
Raised Face (RF) design for pressure sealing
Machined neck for excellent stress distribution in high-load systems
Multiple pressure ratings and sizes available
All fittings and flanges were produced from SS304 stainless steel, offering excellent mechanical properties and corrosion resistance.
ASME B16.5 WN Flange Chemical Composition Test
Why Choose SS304 for Pipe Fittings and Flanges?
SS304 is the most widely used grade of stainless steel in piping applications due to its excellent balance of strength, ductility, and corrosion resistance.
Key Material Properties:
Composition:
Chromium: 18–20%
Nickel: 8–11%
Corrosion Resistance: Excellent in a wide range of environments, including chemical, atmospheric, and water-based systems
Mechanical Strength: Good tensile and yield strength suitable for moderate pressure systems
Weldability: Easily welded using all common welding techniques
Sanitary & Hygienic: Suitable for food-grade and pharmaceutical pipelines as well
Quality Assurance & Manufacturing Excellence
Each product underwent strict dimensional and chemical inspections before dispatch:
Dimensional checks to verify ASME compliance
Chemical analysis to confirm 304 grade accuracy
Smooth weld transitions and surface finish to ensure flow efficiency and safety
Plastic end caps and protective packaging to avoid damage during handling
All fittings and flanges were supplied with 3.1 inspection certificates and traceability documentation.
Custom Sizes & Flexible Production
Haihao Group supports custom fabrication and multi-size production, catering to engineering contractors and EPC companies with both small-batch and large-volume needs. Whether for plant expansion, maintenance shutdowns, or new projects, we offer reliable delivery and technical support.
Partner With Haihao Group
With over four decades of manufacturing experience and clients in more than 100 countries, Haihao Group is your reliable partner for ASME B16.9 pipe fittings and B16.5 flanges. From raw material control to final inspection and logistics, we deliver quality you can trust.
Need stainless steel fittings or flanges for your next pipeline project?
Contact Haihao Group today for customized solutions and competitive prices.