High-performance fasteners and pipe fittings for nuclear reactor applications supplied by Haihao Group

Nuclear reactors represent one of the most demanding engineering environments in the world. From extreme temperatures and high pressures to long-term radiation exposure, the components used within these systems must meet rigorous safety, performance, and traceability standards. At Haihao Group, we specialize in supplying high-grade fasteners and piping components engineered specifically for these harsh environments.

Stud bolts and nuts compliant with ASME SA 193M B16 and SA 194M 2H Standards

Reactor Operating Conditions: Why Quality Matters

In a typical nuclear reactor—whether in power generation, research, or medical applications—components are subject to:

High operating temperatures (typically 300–600°C)

High internal pressures in primary coolant circuits

Corrosive fluids, such as borated water or heavy water

Neutron radiation exposure, which may alter material properties over time

Stringent safety regulations, such as ASME, RCC-M, and ISO 9001 nuclear QA requirements

These conditions demand uncompromising quality, full material traceability, and reliable long-term performance.

Specialized Fasteners: Built for Extreme Conditions

Haihao Group supplies custom stud bolts and nuts that meet the stringent specifications of the nuclear industry. For example, a recent Belarusian customer ordered the following for use in a reactor application:

Stud Bolts: ASME SA-193M Grade B16

Nuts: ASME SA-194M Grade 2H

Optional Grades: SA-193M-24 Gr or B7 with certification

Testing Requirements:

• Ultrasonic Testing (UT)
• Magnetic Particle Testing (MT)
• Positive Material Identification (PMI)
• Full chemical composition and hardness reports

These high-performance fasteners are engineered to resist thermal fatigue, creep, and hydrogen embrittlement, while maintaining mechanical strength under extreme operating conditions.

Swage Nipples

Pipe Fittings for Nuclear Applications

Haihao Group also supplies a comprehensive range of nuclear-grade pipe fittings, including:

Elbows, tees, reducers, and caps

Swage nipples and forged fittings

Welded and seamless fittings conforming to ASME B16.9, B16.11, MSS-SP-95 and others

Materials: Super Duplex Stainless Steel (e.g., UNS S32760), Alloy Steel, Nickel Alloys

Heat treatment and NDE certified

All fittings undergo rigorous non-destructive testing, hydrostatic testing, and dimensional inspection, ensuring zero failure tolerance.

Trusted by Global Energy Clients

Haihao Group has earned the trust of major energy companies and EPC contractors across the globe, including customers in Belarus, Russia, Southeast Asia, and the Middle East and so on. Our products are used in:

• Nuclear power plants
• Refining and petrochemical projects
• Offshore platforms and FPSO systems
• LNG terminals and power stations

We offer full documentation packages including EN 10204 3.1/3.2 certificates, and we welcome third-party inspections from SGS, BV, TUV, and others.

Why Choose Haihao Group?

• 40+ years of experience in pressure piping systems
• Proven ability to meet nuclear-grade requirements
• Fast delivery with global logistics support
• Responsive technical support for customized solutions

Need high-performance fasteners and pipe fittings for a reactor, refinery, or power plant? Contact Haihao Group today to get a certified solution you can trust. Email:sales@haihaogroup.com