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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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  • Threaded Flange

    Threaded Flange

    Threaded flanges are flanges with internal or external threads that are connected by screwing the threads on the flange to the threads on the pipe or equipment against each other. This type of flange is usually used in low-pressure and low-temperature operating environments because of its relatively low connection strength, but easy installation and removal.

    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 90 Degree Elbow

    Threaded 90 Degree Elbow

    Find a huge selection of threaded 90 degree elbow from China at SN Valve. Threaded 90 degree elbow connects with pipes or other fittings through its internal threads to achieve the turn of pipes in 90 degree direction. This kind of elbow is widely used in various industrial, construction and civil piping systems, such as petroleum, chemical, natural gas, water treatment and heating.

    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

  • Non Standard Flange

    Non Standard Flange

    Non standard flanges are relative to standard flanges, which refer to those flanges that do not conform to the standard sizes, shapes or materials stipulated by the state or industry.
    Non-standard: the size, shape or material of non-standard flanges usually do not conform to common national or industry standards.
    Customization: due to the special nature of non-standard flanges, it usually needs to be customized and produced according to the specific needs of customers.

    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

  • RTJ Male Figure-8 Blank

    RTJ Male Figure-8 Blank

    Find a huge selection of rtj male figure-8 blank from China at SN Valve. RTJ Male Figure-8 Blank is a piping accessory with a special shape and structure, which resembles the cross-section of the figure ‘8’ and has a convex design of the ring connection surface. The blind consists of two flat plates parallel to each other and an intermediate section connecting them to form an ‘8’. The convex design is used to mate with the ring joint flange to achieve a tight seal.

    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

  • Porous Plate Flange

    Porous Plate Flange

    SN Valve is a leading China porous plate flange manufacturer. Porous filter plate flange, i.e. a component that combines a porous filter plate with a flange. This kind of component is usually used in occasions where filtration and connection are required, such as filtration devices in piping systems, separation equipment for liquids or gases, and so on. The porous filter plate flange is connected to other pipelines or equipment through flange connection, and at the same time, the filtration function of the porous filter plate is utilized to realize the filtration and separation of liquids, gases or solid particles.

    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

  • What is a Stainless Steel Flange and What is Its Purpose?

    A stainless steel flange is a mechanical component used to connect pipes, valves, pumps, and other equipment in a piping system. It provides a secure and leak-proof joint while allowing for easy assembly and disassembly. Flanges are widely used in industries such as oil and gas, chemical processing, water treatment, and power generation.

  • Stainless Steel vs Carbon Steel Flanges – Revealing Long-Term Cost Savings

    In 2023, Saudi Aramco’s Jazan refinery replaced 1,200 carbon steel flanges with 316L stainless steel, cutting maintenance costs by 55% over 18 months. Coastal humidity caused rapid carbon steel corrosion, while 316L’s chloride resistance extended service life from 3 to 15+ years.

  • What Is a Plate Flange?

    ​In industrial piping systems, structural connections, and pressure equipment, few components are as critical—and as misunderstood—as the plate flange. Whether you are designing a new pipeline, upgrading an existing system, or sourcing components for heavy-duty industrial use, understanding plate flanges can directly impact safety, performance, and long-term cost efficiency.

  • How much do you know about tube sheets?

    In the complex systems of heat exchangers, boilers, and filtration systems, tube sheets are essential components that determine efficiency, safety, and service life. Often described as the backbone of these systems, tube sheets are precision-engineered sheets, typically round in shape, drilled with precisely aligned holes that support, separate, and seal the tubes. As a leading manufacturer in China, SN Valve specializes in advanced engineering and produces high-quality tube sheets that meet the most stringent industry standards.

  • 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.

  • Importance of tube sheet anti-corrosion and how to prevent corrosion?

    Tube sheets are mainly used in chemical containers, such as shell-and-tube heat exchangers and seawater desalination, to support and fix the tubes. The metal material makes it not only very rigid, but also has great thermal conductivity. In its use, tube sheet anti-corrosion is a very important task. Why is this?

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