Haihao Group recently completed a custom order for a client in Côte d’Ivoire, featuring hot-dip galvanized U-bolts with padded sleeves and PTFE-lined washers. This specialized product was designed and manufactured according to the client’s prov ...

Haihao Group recently received a custom order from a domestic client, demonstrating our ability to meet complex and precise requirements in the pipeline systems industry. The order includes a variety of products, such as couplings, tee joints, elbows, hydr ...

At Haihao Group, we continue to meet the diverse needs of our global clients with premium pipeline products. Recently, we successfully fulfilled an order for a Korean customer, delivering a batch of ASME B16.5 ASTM A105 weld neck flanges with meticulou ...

At Haihao Group, we are dedicated to supplying high-quality pipeline and fastening solutions to meet our customers’ diverse needs. Recently, we fulfilled an order for a comprehensive set of galvanized bolts, nuts, and non-asbestos gaskets, ensuring e ...

Haihao Group has successfully completed the production and delivery of a batch of ASME B16.9 A403 WP304 and WP304L seamless reducing tees for a domestic customer. These high-quality fittings are designed to meet stringent project requirements, ensuring rel ...

At Haihao Group, every batch of ASME B16.9 A234 WPB concentric reducers undergoes rigorous quality inspection to ensure compliance with international standards and client requirements. Our recent production for a UK client was no exception, with detailed c ...

At Haihao Group, we are dedicated to delivering high-quality fastening solutions to meet the diverse needs of our global customers. Recently, we successfully completed an order for a valued customer, supplying a batch of full thread bolts, nuts, and fl ...

We are delighted to announce the completion of an order for galvanized flat gaskets for our Russian customer. These gaskets are made of premium carbon steel and are engineered to provide excellent performance and durability. galvanized flat gaskets Product ...

A-335 Gr. P11 is a widely used chromium-molybdenum alloy steel designed for high-temperature and high-pressure environments. Known for its superior mechanical properties, chemical stability, and thermal resistance, this material is extensively utilized in ...

At Haihao Group, as experts in piping systems, we not only provide reliable piping products but also excel in maintenance practices for various pipeline systems. Proper maintenance and care are essential for pressure pipelines to ensure their safety, perfo ...

At Haihao Group, we take pride in providing high-quality pipeline products that cater to the specific requirements of our customers. We recently completed a significant order for our UAE customer, delivering ASME B16.9 A815 Gr.S31803 seamless concentric re ...

Pipe caps, essential components in pipeline systems, are used to seal or protect the ends of pipes. Besides threaded connections, several other methods are employed to connect pipe caps to pipes, depending on the material, pressure, temperature, and applic ...

Our client recently placed an order for ASME B16.9 concentric reducers made of ASTM A234-WPB material, with a galvanized surface treatment. These butt-welded reducers are used to connect pipes of different diameters in a smooth and efficient manner, ensuri ...

Thickness measurement plays a critical role in ensuring the integrity and safety of various materials, especially in industries like pipeline systems, pressure vessels, and structural components. Traditionally, manual measurement methods such as calipers a ...

Weld porosity is one of the most common defects found in welding. It occurs when gas becomes trapped in the molten weld pool during the solidification process, leading to small holes or voids in the weld metal. These voids can weaken the weld’s struc ...

Weld porosity is a common defect that occurs during the welding process, resulting from gas entrapment in the weld metal. Understanding the different types of weld porosity and their causes is crucial for preventing this issue and ensuring the integrity of ...

Haihao Group recently completed an order for a domestic client who required specialized A234 WP22 Class 1 180° elbows. These elbows are specifically engineered for high-pressure and high-temperature applications, showcasing our capability to deliver custom ...

At Haihao Group, we are committed to providing our clients with the highest quality pipeline products, engineered to meet the demands of industries worldwide. Recently, we completed the successful shipment of a range of ASME B36.10 ASTM A106 Grade B pipes ...

In piping systems, both seamless and welded pipe fittings play essential roles. However, their manufacturing processes differ, and as a result, their quality control requirements also vary. This article will highlight the key differences in the inspection ...

ASTM A860 is a standard that covers the specifications for forged low alloy high strength butt-weld fittings used in high-pressure oil and gas transmission and distribution systems. These fittings, made from seamless or electric fusion welded pipe material ...