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 ...

Haihao Group has successfully completed the production and delivery of a batch of ASME B16.9 A403 WP304L eccentric reducers for a domestic customer. These high-quality reducers are designed to meet rigorous industrial requirements, providing reliable perfo ...

Haihao Group recently fulfilled an order from a valued client in the UAE for a batch of ASME B16.9 A234 GR.WPB pipe caps. The ordered pipe caps were specified at a size of 24 inches with a black-painted surface finish. The client set stringent requirements ...

Haihao Group recently completed an order for a UK client, delivering a batch of ASME B16.9  A234 WPB concentric reducers. This order included sizes ranging from 3/4″ x 1/2″ to 16″ x 14″, all with a durable black-painted surface for ...

At Haihao Group, we take pride in delivering premium piping components that meet stringent industry requirements. Recently, we successfully completed an order of ASTM A234 GR. WPB 90-degree short radius (SR) elbows for our valued customer in Singapore. The ...

We are pleased to announce the successful fulfillment of an order for hex bolts with nuts for our valued Russian customer. These components are made from high-quality carbon steel, ensuring durability and reliability in various applications. Carbon steel h ...

MSS-SP-97 A182 F11 CL.1 weldolet is a high-quality branch connection fitting designed to provide a seamless and reinforced solution for pipe branching. Known for its robust mechanical properties and exceptional corrosion resistance, this product is widely ...

At Haihao Group, we are dedicated to delivering high-quality pipeline products that meet the diverse requirements of our customers. Recently, we successfully completed an order for our Malaysian customer, providing ASME B16.9 A234 WPB pipe caps with the fo ...

Recently, a domestic client ordered DN80 (3-inch) threaded caps for use in their high-pressure system, reflecting the practical value of this product in various industrial applications. What is a threaded cap? A threaded pipe cap is a pipe fitting used to ...