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China Dual Phase Steel Flange Manufacturer, Supplier, Factory

We believe that prolonged time period partnership is really a result of top of the range, benefit added provider, prosperous knowledge and personal contact for Dual Phase Steel Flange, Flange, Alloy Flange, Carbon Steel Flange, Industrial Pipe Fittings, we could solve our customer problems asap and do the profit for our customer. For those who need superior provider and excellent , pls choose us , thanks !
Dual Phase Steel Flange, With many years good service and development, we've a professional international trade sales team. Our products have exported to North America, Europe, Japan, Korea, Australia, New Zealand, Russia and other countries. Looking forward to build up a good and long term cooperation with you in coming future!

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  • Socket Welding Cross

    Socket Welding Cross

    A socket welding cross is a fitting with four openings, three of which are connected to the main pipe and one of which serves as a connection for a branch pipe. Its structure is characterised by the fact that at least one of the openings is designed as a socket port, which can be inserted into the pipe and connected by welding. Socket weld cross is usually made of high quality carbon steel, alloy steel or stainless steel to ensure its high strength and good sealing performance.

    SIZE:
    DN10(3/8") DN15(1/2") DN20(3/4") DN25(1") DN40(1-1/2")
    DN50(2") DN80(3") DN100(4") DN125(5") DN150(6")
    DN200(8") DN250(10") DN300(12") DN350(14") DN400(16")
    DN450(18") DN500(20") DN550(22") DN600(24")
    Customized Size Consult Us

  • Threaded 45 Degrees Elbow

    Threaded 45 Degrees Elbow

    SN Valve is a leading China threaded 45 degrees elbow manufacturer. Threaded 45 degrees elbow bends the pipe in 45-degree direction by means of threaded connection, so as to realise the change of pipe direction. It is widely used in industrial fields such as petroleum, chemical, natural gas, water treatment and heating, as well as in building and civil piping system.

    SIZE:
    DN10(3/8") DN15(1/2") DN20(3/4") DN25(1") DN40(1-1/2")
    DN50(2") DN80(3") DN100(4") DN125(5") DN150(6")
    DN200(8") DN250(10") DN300(12") DN350(14") DN400(16")
    DN450(18") DN500(20") DN550(22") DN600(24")
    Customized Size Consult Us

  • Socket Welding 90 Degrees Elbow

    Socket Welding 90 Degrees Elbow

    SN Valve is a leading China socket welding 90 degrees elbow manufacturer. Socket welding 90 degrees elbow plays a role in pipeline connection to change the direction of fluid transmission, so that the fluid can be turned at right angles. It is designed with a socket at one end, and the other end is matched with the outside diameter of the pipeline, for insertion into the main pipe for welding. Socket welding 90 degree elbow is mainly used in small diameter, high pressure piping system, especially in the need to strictly control the risk of leakage and higher strength requirements of the occasion, such as petroleum, chemical, electric power and other industries in the pressure piping system.

    SIZE:
    DN10(3/8") DN15(1/2") DN20(3/4") DN25(1") DN40(1-1/2")
    DN50(2") DN80(3") DN100(4") DN125(5") DN150(6")
    DN200(8") DN250(10") DN300(12") DN350(14") DN400(16")
    DN450(18") DN500(20") DN550(22") DN600(24")
    Customized Size Consult Us

  • Socket Welding 45 Degrees Elbow

    Socket Welding 45 Degrees Elbow

    Socket welding 45 degrees elbow is mainly used to change the direction of transmission of fluid in a piping system by turning it at an angle of 45 degrees. It is designed with a socket at one end and an outer diameter matching the pipeline at the other end, making it easy to insert into the main pipeline for welding. This elbow is usually used in small diameter, high pressure piping systems, such as petroleum, chemical, electric power and other industries in the pressure piping system, to ensure that the fluid in the transmission process is smooth and safe.

    SIZE:
    DN10(3/8") DN15(1/2") DN20(3/4") DN25(1") DN40(1-1/2")
    DN50(2") DN80(3") DN100(4") DN125(5") DN150(6")
    DN200(8") DN250(10") DN300(12") DN350(14") DN400(16")
    DN450(18") DN500(20") DN550(22") DN600(24")
    Customized Size Consult Us

  • Welding Neck Flange

    Welding Neck Flange

    Chinese manufacturer SN Valve offers high-quality Welding Neck Flange. A butt-weld flange is a flange with a longer neck that usually matches the outer diameter of the pipe so that it can be welded to the pipe. This flange structural design improves the rigidity and strength of the flange, while improving the sealing performance of the connection. Butt-weld flanges are usually made of high-quality forged steel materials and can withstand high-pressure and high-temperature working environments.

    SIZE:
    DN10(3/8") DN15(1/2") DN20(3/4") DN25(1") DN40(1-1/2")
    DN50(2") DN80(3") DN100(4") DN125(5") DN150(6")
    DN200(8") DN250(10") DN300(12") DN350(14") DN400(16")
    DN450(18") DN500(20") DN550(22") DN600(24")
    Customized Size Consult Us

  • Loose Flange

    Loose Flange

    Loose flange is a type of flange connection that is characterized by a certain degree of mobility or removability of the connection between the flange and the pipe or equipment. This type of connection allows the flange to be easily Loose flange is widely used in a variety of industrial fields, especially in situations that require frequent disassembly and replacement of equipment. It allows the pipeline or equipment to be moved and adjusted to a certain extent without being restricted by the flange, thus improving the flexibility and adaptability of the system.

    SIZE:
    DN10(3/8") DN15(1/2") DN20(3/4") DN25(1") DN40(1-1/2")
    DN50(2") DN80(3") DN100(4") DN125(5") DN150(6")
    DN200(8") DN250(10") DN300(12") DN350(14") DN400(16")
    DN450(18") DN500(20") DN550(22") DN600(24")
    Customized Size Consult Us

  • The Dangers of Low-Quality Flanges: A Warning from Stainless Steel Flange Manufacturers

    Wenzhou Shuangneng warns against low-quality flanges causing leaks, explosions, and costly downtime. As a certified stainless steel flange fittings manufacturer, we ensure ASME B16.5-compliant products with PMI testing, Ra≤3.2μm surfaces, and 25+ year lifespans.

  • What is a Tube Sheet and Why is It Essential in Heat Exchangers and Other Industrial Applications?

    A Tube Sheet is a critical component used in heat exchangers, pressure vessels, and other industrial systems. It is a flat plate that features a series of holes or perforations designed to accommodate tubes or pipes. The tubes are inserted into these holes, and the Tube Sheet serves as a structural support, ensuring that the tubes remain securely in place while allowing for fluid or heat transfer between the different sections of the system. Tube Sheets are typically made from materials such as stainless steel or other corrosion-resistant alloys due to their durability and resistance to harsh operating conditions.

  • How Does Socket Weld FLANGE Work?

    Socket Weld FLANGE is a critical component in high-pressure piping systems, widely used in industries such as petrochemical, power generation, shipbuilding, and hydraulic engineering. This article explains its working principle, structural characteristics, advantages, installation methods, and real-world applications. It also addresses common customer concerns such as leakage risks, welding complexity, and selection criteria to help engineers and procurement specialists make informed decisions.

  • The Advantages of Duplex Steel Flanges: Why They Outperform Standard Stainless Steel Flanges

    Wenzhou Shuangneng Valve Co., Ltd. specializes in manufacturing corrosion-resistant stainless steel, duplex steel, and specialty alloy flanges, pipe fittings, and custom components for 20+ years. Compliant with ASME, DIN, JIS, and GB standards, we offer OEM solutions with MOQ 1 unit. Ideal for harsh environments in oil/gas, chemical, and marine industries.

  • Preventing Chloride Stress Corrosion: Why 316L Stainless Steel Flanges Outperform Carbon Steel in Coastal Plants

    In 2023, Wenzhou Shuangneng Valve Co., Ltd. helped an Indonesian power plant replace carbon steel flanges with 316L stainless steel, reducing chloride-induced failures by 40% within 12 months. Coastal salt spray and humidity accelerated corrosion in carbon steel, while 316L’s molybdenum-rich alloy prevented stress cracking.

  • The origin of ship flanges and ship flat welding flanges

    The origin of the product name 'marine flange' is closely related to its intended use.

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