At Haihao Group, we are proud to supply a comprehensive range of P265GH seamless pipe fittings to clients worldwide. Recently, a customer from the United Kingdom placed an order for customized fittings made from P265GH material, including various sizes of ...

Haihao Group has successfully completed the custom production of precision steel tubes for a long-term customer in South Africa, based on detailed technical drawings provided by the client. This project once again showcases Haihao’s strong customizat ...

In the heart of Siberia’s energy complexes and across Russia’s expansive industrial landscapes, reliability isn’t just a preference—it’s a necessity. At Haihao Group, we’ve engineered ASME B16.11 ASTM A350 Gr LF2 Cl 1 socket w ...

April 15, 2025 – The second day of the NEFTEGAZ 2025, Russia’s leading oil and gas exhibition, continues to bring energy and momentum to the Moscow Expocentre. Haihao Group, a global supplier of industrial pipe fittings, flanges, and pipeline solutio ...

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 t ...

The 2025 NEFTEGAZ International Exhibition for Equipment and Technologies for the Oil and Gas Industries is just 4 days away! Haihao Group is excited to announce our participation in this premier oil & gas event, held from April 14 to April 17, 2025, a ...

In modern industrial operations, maintaining continuous production is essential. Online leak sealing (also known as leak repair under pressure) is a highly effective technology that allows for the safe repair of leaking pipelines and equipment without halt ...

When selecting materials for industrial piping systems, 304 and 316 stainless steel are the two most common choices. Both are known for strength, durability, and corrosion resistance—but which one is right for your project? ASME B16.9 A403 WP304L eccentric ...

Why Quality Control Matters in Pipeline Projects? In the oil & gas, petrochemical, and construction industries, pipeline reliability is critical for safety and efficiency. A single failure in a pipeline system can lead to costly downtime, environmental ...

Recently, Haihao Group successfully supplied a batch of ASTM A36 steel products to a long-term client in Côte d’Ivoire. The order included: 75×40×9mm steel channels (6m length) 40×40×4mm steel angles (6m length) 50×50×6mm steel angles (6m length) 2m× ...

Large-diameter flanges, such as ASME B16.47 welding neck (WN) and blind flanges, play a critical role in high-pressure and high-temperature pipeline systems. To ensure their reliability, strict quality inspection and testing are essential before shipment. ...

What is duplex stainless steel S31803? Duplex stainless steel ASTM A240 UNS S31803 is a widely used duplex alloy that combines the best properties of austenitic and ferritic stainless steels. It has a two-phase microstructure consisting of approximately eq ...

In industries dealing with low-temperature applications, material toughness is a crucial factor in ensuring safety and reliability. ASTM A420 WPL6 pipe fittings, commonly used in LNG plants, cryogenic systems, and pipelines operating in freezing environmen ...

When selecting valves for industrial piping systems, understanding the differences between gate valves and butterfly valves is essential. Both are widely used, yet their distinct designs, operating mechanisms, and applications mean that each is suited to d ...

Gate valve seat and gate leakage is one of the most common issues encountered during installation and maintenance. This type of leakage generally falls into two categories: Sealing surface leakage Seal ring root leakage Proper preventive measures can signi ...

When it comes to industrial piping systems, selecting the right pipe fittings is essential for ensuring efficiency, durability, and corrosion resistance. One of the most widely used materials in high-performance piping systems is ASTM A403 WP316/316L stain ...

Heat treatment is essential for enhancing the mechanical properties, stability, and machinability of valve body castings. Different materials require specific heat treatment processes to achieve optimal performance. Below are the heat treatment processes b ...

Valve bodies are made from various materials depending on their temperature range, pressure rating, and application environment. Below are nine commonly used materials: 1.Gray Cast Iron Suitable for operating temperatures between -15°C to +200°C. Used in l ...

Control valves play a crucial role in regulating fluid flow in industrial systems. Any malfunction can significantly impact system stability and performance. Proper maintenance is essential to reduce failure rates and ensure long-term reliability. Control ...

Control valves are critical components in industrial processes, ensuring precise control of fluid flow and pressure. Their reliability and longevity directly impact production efficiency and quality. To maximize their service life, it’s essential to ...