Haihao Group Supplies Hot-Dip Galvanized Bolt & Nut Sets for Singapore Pipeline Project

Haihao Group has recently completed the shipment of a full range of hot-dip galvanized bolt and nut assemblies to a valued customer in Singapore. These fastening products are designed specifically for pipeline fittings and modular steel structures, ensuring reliable performance in demanding industrial environments.

Project Overview

The order covers multiple bolt sizes ranging from M12 to M30, supplied as complete fastening sets. Each set includes:

• Hex bolts
• One airtight self-locking nut
• Two flat washers

All components are manufactured in strict accordance with ASTM and ISO standards, making them suitable for long-term outdoor and structural applications commonly found in oil & gas, power generation, and modular construction projects.

Hot dip galvanized ASTM F568M Class 8

Material & Standard Compliance

To meet the customer’s technical and durability requirements, all bolts and nuts were produced using certified materials:

• Bolt Material: ASTM F568M Class 8.8
• Nut Material: ASTM A563M Class 8
• Surface Treatment: Hot Dip Galvanization

The galvanizing process fully complies with ISO 1461 or ASTM A153, providing excellent corrosion resistance and extended service life, particularly in humid or coastal environments such as Southeast Asia.

Typical Sizes Supplied

The shipment includes a wide range of commonly used metric dimensions, such as:

• M12×55
• M16×70
• M20×75 / M20×80
• M24×90 / M24×95
• M30×125

These sizes are widely applied across different modules (TS003, TS040, TS051, TS102, TS151, TS154), ensuring compatibility with various pipeline fitting assemblies.

Quality Control & Packaging

All bolt and nut sets underwent strict dimensional inspection, mechanical property testing, and coating thickness checks prior to dispatch. Products were securely packed to prevent damage to the galvanized surface during international transportation.

Haihao Group follows a standardized quality control system to ensure that every shipment meets project specifications and international expectations.

Why Choose Haihao Group

With extensive experience in pipeline fittings and fastening solutions, Haihao Group provides:

• Stable supply of ASTM-standard bolts and nuts
• Custom size and module-based matching
• Reliable export packaging for overseas projects
• Technical support for pipeline and structural applications

Our products are trusted by clients across Southeast Asia, the Middle East, and global energy markets.