Haihao Group takes pride in delivering high-quality piping solutions that meet the most demanding industry standards. As part of our rigorous quality control process, we recently conducted chemical composition testing on ASTM A335 GR P5 seamless pipes, whi ...

In the production of pipe fittings, ensuring precise dimensions and consistent wall thickness is essential for both performance and reliability. At Haihao Group, we recognize that quality assurance is a cornerstone of delivering products that meet the dema ...

In the diverse world of pipe fittings, the EN 10253-2 SMLS reducing tee stands out as a key component for connecting pipelines of different diameters. These fittings, made from seamless (SMLS) carbon steel and adhering to the EN 10253-2 standard, provide r ...

Reducers, also known as reducing fittings or reducer joints, are widely used components in various piping systems. Their primary purpose is to connect pipes of different diameters to meet the design and operational requirements of the pipeline system. One ...

In a recent collaboration with a Singapore-based client, Haihao Group delivered a series of high-quality piping components designed to meet the stringent requirements of industrial projects. Among these components was the MSS SP-97 P280GH forged SW union ( ...

Recently, Haihao Group signed a contract with a valued client from the United Arab Emirates (UAE) to supply high-quality ASME B16.9 reducing tees. These products are tailored to meet the stringent requirements of their applications in challenging environme ...

Haihao Group recently received an order from a valued Russian client for GOST 17375-2001 45° LR Elbows made from ASTM A403 WP316 stainless steel. This project demonstrates our commitment to meeting international standards and providing high-quality product ...

ASME B16.9 pipe fittings made from A234 WPB material are commonly used in the construction of piping systems, especially in industries requiring high strength and reliability under pressure. These fittings are manufactured in accordance with the ASME B16.9 ...

As a leader in the piping system industry, Haihao Group frequently receives orders for custom-manufactured products based on client-provided specifications and drawings. One such recent order from a valued Russian client highlights our expertise in deliver ...

Pressure vessels play a critical role in industrial operations, but they pose significant risks if not properly maintained and operated. At Haihao Group, we prioritize safety and share our expertise to help prevent accidents. Below are essential measures t ...

As a leader in pipeline systems and a trusted supplier of forging and pressure vessel components, Haihao Group has gained extensive expertise in the field of pressure vessels. Today, we’d like to share insights into the common causes of pressure vess ...

Butterfly valves are widely used for controlling the flow of fluids in pipelines. They operate by using a circular disc (the “butterfly”) that rotates approximately 90° to open, close, or regulate the flow. Due to their unique design and functi ...

Gate valves are widely used in pipeline systems for isolating flow. The closing element, known as the gate or wedge, moves vertically to the axis of the channel. Gate valves are typically designed for full open or full close positions and are generally not ...

Globe valves are designed with a closure element (disk) that moves along the centerline of the valve seat. This linear motion creates a proportional relationship between the valve’s flow opening and the disk’s travel distance. The short travel ...

Ball valves, developed from plug valves, utilize a spherical closure element to control the flow of media. By rotating the ball 90° around the stem’s axis, the valve can fully open or close. In pipeline systems, ball valves are primarily used to shut ...

Haihao Group proudly announces the successful production and delivery of EN 10253-2 pipe fittings for our esteemed Swiss customers. These fittings underwent rigorous SGS tripartite testing, ensuring they meet the highest standards of quality and compliance ...

Chemical composition testing is a crucial step in manufacturing high-quality piping components. It ensures that the material used meets the specified standards, guaranteeing product performance and reliability under demanding conditions. Recently, Haihao G ...

Swivel flanges are a specialized type of weld neck flange, designed with an outer ring that allows 360° rotation of the inner ring. This unique feature enables rapid alignment of bolt holes with the standard flange, making swivel flanges an ideal choice fo ...

A694 Gr. 60 is a high-strength carbon steel material widely used in the oil and gas industry, particularly for manufacturing flanges, fittings, and other pipeline components. It is specifically designed to withstand high-pressure and high-temperature condi ...

The DIN 912 A4-80 hex socket head bolt is a premium-grade fastening component, widely recognized for its exceptional strength, durability, and resistance to harsh environments. Designed to meet the stringent standards of DIN 912, this bolt is a reliable ch ...