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 ...

When it comes to piping systems, the choice of flange type is crucial for ensuring the integrity and functionality of the system. Two common types of flanges are threaded flanges and weld neck flanges. Each has its unique characteristics and applications, making them suitable for different scena ...

In the piping system, flanges play a vital role in establishing a safe connection between pipes and other components. Among the various types of flanges, reducing diameter flanges and threaded flanges are two common flanges. This article will introduce to you what is a reducing diameter flange a ...

In the production of spiral wound gaskets, the choice of materials for the metal and non-metal strips is critical for ensuring optimal sealing performance. Here’s an overview of the specifications for basic type wound metal strips and non-metal strips. Basic Type Wound Metal Strip 1.Basic ...