Haihao Group has delivered a full range of ASTM A350 LF2 CL1 flange assemblies for a low-temperature process piping project in Singapore. This comprehensive shipment covers multiple flange types, pressure classes and surface finishes, strictly fabricated in accordance with ASME B16.5 and ASME B1 ...

The 12th International Tube & Pipe Industry Trade Fair (Tube China 2026) officially opened today at the Shanghai New International Expo Centre (SNIEC), bringing together pipeline operators and fluid handling professionals from across the globe. Located at Booth W2A02, Haihao Group is display ...

Haihao Group recently completed production and shipment of custom 316L spiral wound gaskets for an industrial project in the United Arab Emirates. Unlike standard stock gaskets, this batch of 316L spiral wound gaskets was fully fabricated according to the customer’s technical drawing, with preci ...

Haihao Group has finished manufacturing and dispatched ASME B16.48 line spade blinds for a Russian oil & gas pipeline project. These line spade blinds are used for positive isolation of piping systems during maintenance and shutdown operations, fabricated from ASTM A240 Type 316 stainless st ...

Haihao Group has finished production and shipment of ASME B16.20 oval gasket for a Russian high-pressure piping project. This batch of RTJ type oval gaskets is sized at 8 inch, ring groove number R49, rated for Class 900 service, manufactured from S30900 alloy material. RTJ oval metal gaskets ar ...

Operating processing facilities in northern Eurasia requires specialized piping components engineered to handle severe sub-zero thermal stress without compromise. Large pressure fluctuations combined with arctic ambient conditions place heavy demands on flange sealing faces and weld hub transiti ...

A full set of ASME B16.5 150CL flanges has left Haihao Group’s workshop, ready for delivery to a piping project in Kenya. This order combines multiple flange types and two material grades, tailored to different pipe connection points on the site. The project team selected ASME B16.5 150CL flange ...

Operating high-pressure gas trunklines and processing manifolds across the Middle East requires flanged connections that handle extreme mechanical loads without risk of environmental stress cracking. When linking high-yield pipeline steel with process skids, flanged joints must balance structura ...

Operating high-pressure processing lines in offshore marine skids and subsea tie-ins requires positive fluid isolation hardware that guarantees absolute leak-tight sealing during operational maintenance. In severe-duty environments, standard carbon steel or basic austenitic isolation plates risk ...

Connecting high-pressure topside manifolds, fuel skids, and subsea tie-in loops in Singapore’s marine construction yards demands flanged connections with unyielding mechanical strength and zero-leakage sealing interfaces. Standard lightweight flanges often fail under the severe cyclic stresses, ...

In high-capacity oil and gas processing networks, line maintenance requires positive, zero-leakage fluid isolation. While standard shutdown valves can suffer from seat erosion over time, mechanical line blinds provide an unquestionable physical barrier during equipment servicing, pressure testin ...

Haihao Group recently completed the supply of a 1-inch ASTM A105N weld neck flange for an Iraqi customer. The order was specified for Class 150 service, raised face (RF), Schedule 160, and compliance with ASME B16.5 and NACE MR0175. This order is a good example of a small-diameter flange with a ...