A few days ago, we wrapped up a small but very specific job for a client in Russia—16-inch weld neck flanges, made from ASTM A182 F316L stainless steel, with some non-standard requirements that needed a bit more attention than usual. The client is working on a pipeline section that uses 406.4 mm ...

In the intricate world of industrial pipelines, the integrity of every connection is paramount for operational safety and efficiency. Flanges serve as crucial connecting points, ensuring leak-proof seals and structural stability under immense pressure and varying temperatures. Haihao Group, a gl ...

In the world of piping and pressure vessel systems, ASME flange standards play a critical role in ensuring safety, reliability, and global compatibility. Whether used in oil & gas, chemical processing, power generation, or water treatment, flanges serve as essential components for connecting ...

Recently, Haihao Group produced a batch of ASME B16.36 orifice flanges for Singapore customers. In industrial piping systems, choosing the right flange type is crucial for system performance, safety and flow measurement accuracy. The most common one is the ASME B16.5 flange, which is widely used ...

In industrial pipeline systems, spectacle blinds play a vital role in system isolation for maintenance, testing, or safety shutdowns. When manufactured from ASTM A240 Grade 316/316L stainless steel, these components offer excellent corrosion resistance, mechanical durability, and compatibility w ...

In 2025, Haihao Group successfully completed the production and quality inspection of stainless steel spectacle blinds for a valued client in Singapore. These critical flow-control components were manufactured from ASTM A240 Grade 316/316L stainless steel and in full compliance with the ASME B16 ...

At Haihao Group, we understand the precision demands of global engineering procurement teams. When Singapore’s leading energy infrastructure contractor approached us for ASME B16.48 ASTM A240 GR. 316 spectacle blind flanges, our engineering team prioritized material integrity, dimensional ...

Haihao Group specializes in manufacturing industrial flanges that adhere to the most rigorous international benchmarks, with our ASME B16.5 A105N RF weld neck flanges standing as a testament to our dedication to precision engineering. These flanges are engineered to deliver exceptional performan ...

Haihao Group, a global leader in industrial flanges and pipeline products, has successfully fulfilled a high-specification order for ASME B16.5 ASTM A694 F65 and A350 LF2 CL1 weld neck flanges (1″ & 3″, 600# & 2500#) for a Singaporean client. Key Technical Specifications Materials: A694 ...

If you are involved in the construction of refineries and petrochemical plants,high-temperature and high-pressure pipelines are the norm. These systems transport critical fluids such as crude oil, steam, and process chemicals under extreme operating conditions. Ensuring a reliable, leak-free con ...

Haihao Group, a comprehensive service provider integrating industry and trade, offers one-stop solutions. Recently, we fulfilled an order for EN 1092-1 RF weld neck flanges in dimensions ranging from 40 to 150 millimeters, with a pressure rating of PN16 and made from P355QH1 material, for a Mala ...

Haihao Group has successfully completed the production and delivery of a batch of API 6A WN Flange RTJ 10,000 PSI SAE 4140 products for a valued client in Argentina, reinforcing our commitment to supplying high-performance flanges for demanding oil and gas applications. Product Overview This shi ...