Following a successful March delivery of 15x5M alloy seamless elbows and reducers, Haihao Group received two new flange orders from the same Russian client in April. The repeat orders confirm the client’s trust in Haihao’s strict quality control, precision manufacturing, and reliable ...

Haihao Group has recently completed an order of ANSI B16.5 F316L blind flanges and ASME B16.20 316L spiral wound gasket for a client. The flanges are made of 316L material and are available in sizes of 2, 3, 4, and 6 inches. They have thickness options of 150# and 300#. The gaskets, also made of ...

Haihao Group recently completed an order of ANSI B16.5 ASTM A105 RF weld neck flanges for a client in Hong Kong. These flanges are made to the ANSI B16.5 standard and use ASTM A105 material. They come in sizes of 8 and 12 inches, with a 150LB pressure rating and SCH40 schedule. The total length ...

Haihao Group has just wrapped up an order of ASME B16.47 SERIES A ASTM A350 GR. LF2 CL1 RF weld neck flanges for a client in Singapore. These flanges are made to the ASME B16.47 SERIES A standard and use ASTM A350 GR. LF2 CL1 material. They have an outside diameter of 38 inches, a thickness of 0 ...

Haihao Group just finished an order of ГОСТ 33259 12Х18Н10Т/AISI321 RF weld neck flanges for a Latvian client. The flanges are made to the ГОСТ 33259 standard and use 12Х18Н10Т/AISI321 material. They come in sizes from DN200 to DN400 and have a PN16 pressure rating. The 321 grade material has th ...

Flanged connections are essential in piping systems that require secure, detachable joints. They allow for easier maintenance, inspection, and replacement of components. However, not all flanges are the same. In this article, we’ll explain the most common flange face types: Flat Face (FF), Raise ...

Haihao Group has successfully completed an order of Nickel Alloy ASTM B564 UNS N06625 ASME B16.5 NACE MR-01-75 RF Weld Neck Flanges for a Singapore client. These flanges, sized at 2″ SCH 40S 300#, exemplify our commitment to delivering high-quality products that meet stringent internationa ...

Haihao Group recently fulfilled an order for Type 01 EN1092-1 Q235 slip-on flanges for a client in Malaysia. Product Specifications Material: Q235 carbon steel, known for its excellent mechanical properties and weldability. Standard: EN1092-1, ensuring precise dimensions and compatibility with ...

April 15, 2025, Moscow – Day 2 of Russia’s premier oil and gas exhibition, NEFTEGAZ 2025, continues to electrify the Expocentre Moscow. Haihao Group, a global leader in industrial pipe fittings, flanges, and integrated pipeline solutions, is making waves alongside strategic partners Ganyea ...

At Haihao Group, we are dedicated to delivering high-quality pipe fittings and solutions that meet the most demanding industrial standards. Our recent focus on the DIN 2576 SS 316L FF SO Flange has allowed us to provide exceptional products tailored to meet the specific needs of our Singapore cl ...

As the global energy sector continues to evolve with new challenges and innovations, NEFTEGAZ 2025 is set to once again take center stage as Russia’s premier oil and gas industry exhibition. Taking place from April 14 to April 17, 2025, at the Expocentre Fairgrounds in Moscow, this flagshi ...

In the industrial piping sector, off-the-shelf products don’t always meet every project’s specific requirements. That’s why custom manufacturing is essential—especially when working with complex systems or international standards. Recently, Haihao Group produced a batch of custom pip ...