Flange sealing surfaces typically feature a ring of serrated threads, commonly referred to as a serrated gasket surface. This distinctive design plays a vital role in enhancing the sealing performance of flanges, particularly in high-pressure and high-temperature environments. The serrated surfa ...

Haihao Group is proud to announce the successful preparation and delivery of GOST 33259 weld neck flanges for a valued customer. These high-quality flanges are engineered to meet the demanding requirements of industrial applications, ensuring reliability and precision. Product Details Standards ...

Haihao Group has successfully completed an order of flat flanges for our Australian customer, crafted from premium Q235B material. These flanges were meticulously processed and treated to meet the specific requirements of the project. Product Specifications Material: Q235B, known for its excelle ...

Haihao Group is pleased to announce the recent production of ASME B16.5 RTJ A182 F22 CL.1 blind flanges for a Singapore customer. This particular blind flange, sized at 3/4″ with a Class 1500 pressure rating, features a Ring Type Joint (RTJ) design, which guarantees exceptional sealing per ...

At Haihao Group, we prioritize precision and quality in every product we deliver. Recently, we completed the production and inspection of a batch of ASME B16.5 A105N hot-galvanized reducing thread flanges, ready to meet the demanding requirements of our UAE customer. These flanges combine robust ...

Overlay welding of slender shafts and large-diameter thin-walled cylinders often results in bending and wave-like deformation due to uneven heat distribution and residual stress. To address these challenges, the following strategies can be applied: overlay welding of large thin walled cylinders ...

At Haihao Group, we are proud to have successfully fulfilled a critical order for our Singapore-based client, consisting of ASTM A182 F51 S31803 JIS B2220 10K RF blind flanges. These flanges are engineered to meet the demanding requirements of industries such as oil and gas, chemical processing, ...

The red lead test is primarily conducted to assess the contact quality between octagonal gaskets and the sealing surfaces of high-pressure flanges. This straightforward yet effective test ensures optimal sealing performance by identifying irregularities in the contact area. Testing Procedure 1.P ...

Overlay welding, a welding process that applies a layer of specialized material to a base metal, plays a critical role in enhancing the performance and lifespan of components across various industries. By introducing wear-resistant, corrosion-resistant, or impact-resistant properties to the surf ...

Among the products that Haihao Group has recently delivered to Indonesian customers,In addition to the steel pipe end caps, Haihao Group also produced a batch of LDPE flange covers for our Indonesian client. The transportation method for these products was similarly divided into two parts: some ...

At Haihao Group, we prioritize the highest standards of quality control to ensure that our clients receive products that meet their exact specifications and requirements. Recently, we completed a rigorous quality inspection for a batch of flanges ordered by a valued client. The order included DI ...

At Haihao Group, we recently prepared a shipment of flange products for our esteemed client in Vietnam, which includes the DIN 2502 PN16 PL flange made from S235JR material. These plate flanges are an essential component in numerous piping systems, known for their reliable performance and durabi ...