HAINER STEEL Pipe Fittings

Complete Piping System Solutions

Comprehensive range of buttweld, socket weld, threaded, and specialty fittings for seamless piping integration

5 Major Categories

1/2" - 48" Size Range

100% Factory Tested

Your Complete Pipe Fitting Partner

HAINER STEEL delivers premium industrial pipe fittings engineered for reliability and performance. From buttweld and socket weld to threaded and specialty configurations, our comprehensive fitting portfolio serves demanding piping applications in oil & gas, petrochemical, power generation, chemical processing, and water treatment facilities worldwide. Every fitting is manufactured to international standards with full material traceability and rigorous quality testing.

Complete Fitting Solutions

Explore our full range of precision-engineered pipe fittings

Buttweld Fittings

ASTM A403 Stainless Steel

Premium seamless and welded stainless steel buttweld fittings offering superior strength and corrosion resistance for critical process piping systems.

Elbows: 90°, 45°, 180° LR/SR
Tees: Equal & reducing
Reducers: Concentric & eccentric
Sizes: 1/2" - 48" (DN15-1200)
Standards: ASME B16.9, GB12459

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Socket Weld Fittings

ASTM A182 Forged Steel

High-strength forged fittings for small bore, high-pressure applications providing leak-free connections with single external fillet welds.

90° & 45° socket weld elbows
Socket weld tees & crosses
Couplings & half couplings
Sizes: 1/8" - 4" (DN6-100)
Pressure: 3000# - 6000#

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Threaded Fittings

ASTM A182 Forged Steel

Versatile screwed fittings for applications where welding is prohibited or impractical, enabling easy installation and maintenance access.

NPT threaded connections
90° & 45° threaded elbows
Threaded tees, crosses, caps
Sizes: 1/8" - 4" (DN6-100)
Standards: ASME B16.11

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Cast Pipe Fittings

MSS-SP114 Low Pressure

Cost-effective cast iron and ductile iron fittings for low-pressure water, wastewater, and HVAC applications with proven durability.

Malleable & ductile iron
Elbows, tees, crosses, caps
Black and galvanized finishes
Sizes: 1/4" - 6" (DN8-150)
Pressure: 150# - 300#

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Specialty Fittings

Custom Solutions

Specialized fittings including stub ends, pipe nipples, swage nipples, couplings, and quick connectors for unique application requirements.

Stub ends (lap joint type)
Pipe nipples & close nipples
Swage nipples & reducers
Quick connect couplings
Custom configurations available

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Groove Fittings

Mechanical Joining

Innovative grooved mechanical fittings enabling fast, flexible, and flame-free installation ideal for fire protection and HVAC systems.

No welding or threading required
Rigid & flexible couplings
Elbows, tees, reducers
Sizes: 1" - 24" (DN25-600)
UL/FM approved for fire service

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Quality Standards & Certifications

Manufacturing to internationally recognized fitting standards

ASME B16.9

Buttweld fittings standard

ASME B16.11

Socket weld & threaded fittings

ASME B16.28

Short radius elbows

MSS SP-75

High test wrought fittings

GB12459

Chinese standard fittings

DIN 2605

European fitting standards

Industries We Serve

Trusted fitting solutions across critical sectors

Oil & Gas

Upstream, midstream, downstream operations

Petrochemical

Refineries and chemical processing

Power Generation

Thermal, nuclear, renewable plants

Water & Wastewater

Municipal and industrial systems

HVAC Systems

Commercial and industrial climate control

Food & Beverage

Sanitary process piping

Why Choose HAINER STEEL Fittings?

Excellence in every aspect of fitting manufacturing and delivery

Premium Materials

Carbon steel A234 WPB, stainless steel A403 WP304/316/316L, alloy steels A234 WP11/WP22, duplex, and nickel alloys. Full material certifications and traceability for every order.

Advanced Manufacturing

State-of-the-art seamless, welded, and forged fitting production utilizing hot forming, cold forming, and precision machining for dimensional accuracy and superior quality.

Rigorous Testing

100% dimensional inspection, PMI testing, hardness verification, and visual examination. Hydrostatic testing, radiographic testing, and ultrasonic examination available upon request.

Comprehensive Range

Complete inventory from 1/2" to 48" in buttweld, socket weld, and threaded configurations. Both standard and custom sizes with competitive lead times for project requirements.

Global Standards

Manufacturing to ASME, ANSI, DIN, EN, JIS, GB, and MSS standards. CE/PED certification for European projects. Custom specifications and special materials accommodated.

Technical Expertise

Experienced engineering team providing fitting selection assistance, piping system design support, material recommendations, and comprehensive after-sales technical service worldwide.

Ready to Discuss Your Pipe Fitting Requirements?

Our technical team is ready to help you select the optimal fittings for your piping system specifications

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