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Global Standards & Certifications

CSA Certified

CSA Standards

CSA C/US Certified

ANSI Compliance

ANSI Standards

ANSI Z21.24 / Z21.75

ISO 9001

Quality Management

ISO 9001 Certified

ISO 14001

Environmental

ISO 14001 Certified

ISO 45001

Health & Safety

ISO 45001 Certified

NON STANDARDIZED CUSTOMIZED PRODUCTS AND SERVICES

Customers can flexibly choose the following parameters according to actual project needs: Product length and diameter. Connection interface type (threaded/welded/flange, etc.) Pressure rating and temperature adaptation range. Packaging method and label content.

Standard Gas Connector Whistle-Free Gas Connector

Standard Gas Connector (CSA Certified)

  • Certification: CSA6.10, CSA6.27 approved; meets ANSI Z21.24 / Z21.75 standards
  • Material: 304 Stainless Steel + Carbon Steel Fittings
  • 3 Coating Options: Choose from Natural, Yellow, or Black finishes
  • Size: Available in 12"–72" lengths and 3/8"-1 1/4"
Standard Gas Connector

Whistle-Free Gas Connector

  • Silent Operation: Eliminates whistling in high-flow tankless heaters
  • High-Flow Design: Engineered for stable, quiet gas delivery
  • Material: 304 Stainless Steel (Durable, flexible, corrosion-resistant)
  • Feature: Eliminates high-frequency noise, Smooth inner bore
  • Compliance: CSA6.10, CSA6.27 approved; meets ANSI Z21.24 / Z21.75 standards
  • Flow: Up to 120,000 BTU/h
Whistle-Free Gas Connector

Product Showcase

Explore our full range of flexible gas hose connectors — designed for safety, durability, and performance

Standard Gas Connector
Large Diameter Pro-Coat Gas Connector
1 1/4" OD x 1" ID | 304 SS GAS CONNECTOR | CSA6.10&CSA6.27
CSA Certified 3 Colors Optional Customizable304 stainless steel
Whistle-Free Connector
Whistle-Free Ball Valve Gas Connector
3/8" OD | Integrated Ball Valve | Noise-Reducing Bore
CSA Certified 3 Colors Optional Customizable304 stainless steel
Heavy-Duty Connector
Heavy-Duty Straight Gas Connector
3/8" OD | 3/4" NPT | Reinforced for Commercial Use
CSA Certified 3 Colors Optional Customizable304 stainless steel
Flexi-Coat Connector
Flexi-Coat Stainless Steel Gas Connector
3/8" OD | 304 SS | Corrosion & UV Resistant
CSA Certified 3 Colors Optional Customizable304 stainless steel
High-Temp Connector
Gas Connector with Ball Valve
1/2" Stainless Steel | 3/4"-16UNF Nut | Integrated Valve
CSA Certified 3 Colors Optional Customizable304 stainless steel
Long-Reach Connector
Range Gas Connector with Valve
3/8" OD | 1/2" MIP x 1/2" FIP | Leak-proof Valve
CSA Certified 3 Colors Optional Customizable304 stainless steel
Compact Connector
Whistle-Free Gas Connector
3/8" MIP x 3/8" MIP | 5/8-18UNF Nut | Concealed Design
CSA Certified 3 Colors Optional Customizable304 stainless steel
OEM Custom Connector
CSST Series
Concealed Piping System
CSA Certified 3 Colors Optional Customizable304 stainless steel

Don't see what you're looking for?

We offer customized solutions tailored to your specific requirements — length, diameter, fittings, coatings, and more.

Contact Us →

Product Application Fields

Ensuring safe and reliable connections across diverse industries.

Water underfloor heating

Health system

Sanitary systems (including medical hygiene, food and beverage processing, pharmaceutical production, and public sanitation facilities)

Fire fighting

Heating system

Heating systems (including civil heating, industrial heating, new energy heating, etc.)

Sealed hose

Water underfloor heating

Long-lasting performance for heating loops.

Gas systems

Fire fighting

High-pressure resistance for safety systems.

Heating system

Gas Grill

Flexible, leak-proof, and easy to install.

Stove system

Gas systems

Reliable supply for industrial pipelines.

Health system

Stove system

Flexible connections for kitchen safety.

Air conditioning

Air conditioning and ventilation

Efficient airflow and drainage lines.

One-stop OEM/ODM Services

Leveraging advanced intelligent manufacturing and standardized quality management — full-process solutions including OEM production, personalized packaging, and custom labels.

OEM/ODM Full Process

Complete solutions from production to packaging for global customers
  • OEM production
  • Personalized packaging
  • Custom labels
  • New product introduction
  • Small-batch trial production
  • Large-batch project execution

Customization

Multiple automated forming and welding lines with high-precision testing labs
  • Complex structures & interface forms
  • Gas, plumbing, electrical threading applications
  • Flexible parameter selection
  • Precisely adapted solutions

Low Minimum Order Quantity

Flexible production plans to accommodate market pace and customer scale
  • Minimum order: 100 pieces
  • MOQ adjustable per project
  • SME trial order verification
  • Diverse market testing
  • Controllable inventory pressure

End-to-End Delivery

Full lifecycle solutions from drawing analysis to final delivery
  • Material selection suggestions
  • Prototype development & sampling
  • Process verification & optimization
  • Mass manufacturing & quality inspection
  • International logistics coordination

Length & Diameter

Product length and diameter

Customizable to project needs

Connection Interface

Threaded / Welded / Flange

Custom interface types available

Pressure & Temperature

Pressure rating

Temperature adaptation range

Packaging & Label

Packaging method

Custom label content

Discuss Your Custom Project

ABOUT HAOYIN

Haoyin (Ningbo) Bellows Technology Co., Ltd. is a professional manufacturer specializing in the R&D, design, and large-scale production of Stainless Steel Gas Connectors (CSST) and Flexible Water Pipes. We are committed to providing safe, efficient, and durable flexible connection solutions for gas infrastructure, residential plumbing, and heating systems worldwide.

Our facility covers over 23,000 square meters (including 18,000 m² of standardized workshops). As a National High-tech Enterprise and Green Factory, Haoyin is fully certified under ISO9001, ISO14001, and ISO45001, with core products meeting rigorous CSA and international standards.

We pride ourselves on a full-process quality management system—from raw material screening and structural design to precision manufacturing and rigorous performance testing. Our flexible manufacturing capabilities allow for quick switching between specifications to meet global customization needs.

Haoyin Factory - Professional Stainless Steel Gas Connector and Water Pipe Manufacturer
18,000m² 01

Factory Area

50+ 02

Advanced Equipment

120+ 03

Employees

30+ 04

Monthly Production
(10,000 meters)

CNAS Accredited

Quality Testing Laboratory

Rigorous testing ensures every product meets the highest standards of safety and performance

CNAS-Accredited Laboratory

The company's internal testing laboratory has obtained CNAS certification, with the qualification to issue authoritative testing reports. Independently completes key performance tests, providing solid guarantee for product quality.

✓ Authoritative report issuance ✓ Independent testing completion ✓ CNAS accreditation
1.7MPa
Burst Pressure
No burst or leakage
800 lbs/in
Tensile Strength
5 minutes without failure
427°C
High-Temp Resistance
Bare pipe / 149°C coated
实验室背景

CNAS
Certified

Qualified to issue authoritative testing reports with international recognition

Laboratory Facilities

实验室设备1
实验室设备2
实验室设备3
实验室设备4
实验室设备5
实验室设备6

Mechanical Tests

  • Bending Fatigue Test30 cycles of 180° bending — no cracks or air leakage
  • Torsional Fatigue Test15 cycles of 90° repeated torsion — structural stability
  • Tensile Test800 pounds per inch for 5 minutes — firm connection
  • Impact & Explosion ResistanceWithstands up to 1040 in-lbf torque and impact

Environmental Tests

  • High-Temperature Durability427°C (bare pipe) / 149°C (coated) — no deformation or leakage
  • Low-Temperature Freezing TestPerformance verification in extreme cold conditions
  • Salt Spray Corrosion TestCorrosion resistance verification
  • Ammonia Corrosion TestHigh-concentration ammonia environment resistance

Safety & Seal Tests

  • Burst Pressure Test1.7MPa high-pressure test — no burst or leakage
  • Air Tightness TestPrecision instrument inspection — no micro-leakage
  • Flame Retardancy TestFlame self-extinguishes within 60 seconds
  • Joint Repeated Connection TestRepeated tightening without leakage
  • Capacity & Flow TestMeasured under 125Pa air pressure

Testing Equipment & Instruments

Bending Test
Tensile Test
Torque Test
Burst Test
Low-Temperature Freezing Test
Laser Projection Measurement
Flame Retardancy Test
Dynamic Swing Test
Salt Spray Corrosion Test

OUR FACTORY

OUR CERTIFICATES

  • Q: Are you a direct manufacturer or a trading company?

    A: We are a manufacturer.

  • Q: Can you provide customized products?

    A: Yes, customized products are our core service. We develop and produce products according to the drawings or samples provided by customers.

  • Q: How does your company ensure product quality?

    A: Our products have obtained CSA and CE certifications. With sufficient manufacturing and testing equipment, we conduct detailed inspections on every single product.

GET A QUOTE

If you have any further questions, please contact us and we will be happy to answer them.

Copyright © Haoyin (Ningbo) Bellows Technology Co., Ltd. All Rights Reserved.

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