ASTM A320 L7 Stud Bolts with ASTM A194 Gr.7 Nuts Shipped to Russia for Low-Temperature Pipeline Applications
Haihao Group has successfully completed the production and shipment of a batch of ASTM A320 L7 stud bolts with matching ASTM A194 Grade 7 heavy hex nuts for a customer in Russia. Manufactured in accordance with ASME B18.31.2 and ASME B18.2.2, these fastening products are designed for demanding low-temperature piping systems used in the oil & gas, petrochemical, LNG, and energy industries.
As a professional supplier of industrial fasteners and pipeline products, Haihao Group provides complete fastening solutions that comply with international standards while meeting project-specific requirements for mechanical performance, dimensional accuracy, and traceability.
ASTM A320 L7 Stud Bolts for Reliable Low-Temperature Service
The main product in this shipment is the ASTM A320 L7 stud bolt, a widely specified alloy steel fastener for pressure piping and pressure vessel applications operating at low temperatures. After proper heat treatment, ASTM A320 L7 material delivers excellent tensile strength together with outstanding impact toughness, making it suitable for harsh environments where conventional carbon steel fasteners may become brittle.
Each stud bolt is supplied with two ASTM A194 Grade 7 heavy hex nuts, ensuring compatibility in strength and performance for flange connections requiring secure and long-lasting sealing.
The products comply with:
- ASME B18.31.2– Continuous Thread Studs
- ASME B18.2.2– Heavy Hex Nuts
- ASTM A320 Grade L7– Low-temperature alloy steel stud bolts
- ASTM A194 Grade 7– Heavy hex nuts
ASTM A320 L7 stud bolts with ASTM A194 Grade 7 heavy hex nuts ready for shipment
Product Specifications
| Product | Thread | Size | Material | Standard |
| Full Threaded Stud Bolt + 2 Heavy Hex Nuts | 8UN | 1-1/2″ × 240mm | ASTM A320 L7 / ASTM A194 Gr.7 | ASME B18.31.2 / ASME B18.2.2 |
| Full Threaded Stud Bolt + 2 Heavy Hex Nuts | 11UN | 5/8″ × 100mm | ASTM A320 L7 / ASTM A194 Gr.7 | ASME B18.31.2 / ASME B18.2.2 |
| Full Threaded Stud Bolt + 2 Heavy Hex Nuts | 10UNC | 3/4″ × 125mm | ASTM A320 L7 / ASTM A194 Gr.7 | ASME B18.31.2 / ASME B18.2.2 |
| Full Threaded Stud Bolt + 2 Heavy Hex Nuts | 8UN | 1-1/4″ × 210mm | ASTM A320 L7 / ASTM A194 Gr.7 | ASME B18.31.2 / ASME B18.2.2 |
| Full Threaded Stud Bolt + 2 Heavy Hex Nuts | 8UN | 1-7/8″ × 320mm | ASTM A320 L7 / ASTM A194 Gr.7 | ASME B18.31.2 / ASME B18.2.2 |
Why ASTM A320 L7 Stud Bolts Are Preferred for Critical Projects
The ASTM A320 L7 stud bolt is commonly specified for low-temperature pressure equipment because it combines high mechanical strength with dependable toughness.
Key advantages include:
- Excellent low-temperature impact resistance
- High tensile and yield strength after heat treatment
- Accurate continuous thread machining
- Reliable preload for flange joints
- Suitable for oil & gas, LNG, offshore and petrochemical facilities
- Compatible with heavy-duty pressure flange assemblies
These characteristics help maintain leak-free flange connections under demanding operating conditions.
Strict Manufacturing and Quality Control
Every ASTM A320 L7 stud bolt supplied by Haihao Group undergoes comprehensive manufacturing and inspection procedures before shipment.
Typical quality control includes:
| Inspection Item | Quality Requirement |
| Raw Material | Verified to ASTM A320 L7 and ASTM A194 Gr.7 specifications |
| Heat Treatment | Controlled quenching and tempering process |
| Thread Inspection | 100% checked according to ASME B18.31.2 |
| Mechanical Testing | Tensile strength, hardness and other required properties verified |
| Dimensional Inspection | Length, diameter and thread accuracy confirmed |
| Final Documentation | Material certificates and inspection reports available upon request |
Complete Pipeline Fastening Solutions from Haihao Group
Besides manufacturing ASTM A320 L7 stud bolts, Haihao Group supplies a complete range of industrial fastening products for international pipeline projects, including:
- Stud bolts
- Heavy hex nuts
- Hex bolts
- Anchor bolts
- Washers
- Stainless steel fasteners
- Alloy steel fasteners
- High-strength bolting assemblies
These products are widely used together with flanges, valves, pressure vessels, and piping systems in refineries, chemical plants, LNG terminals, offshore platforms, and power generation facilities.
Whether your project requires standard fasteners or customized dimensions, Haihao Group can provide manufacturing, inspection, packaging, and worldwide delivery according to international specifications.
If you are looking for a reliable supplier of ASTM A320 L7 stud bolt products or complete industrial fastening solutions, our engineering and sales teams are ready to support your next project.