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PP Coupling Pph Pipe Fitting, Our main objectives are to provide our customers worldwide with good quality, competitive price, satisfied delivery and excellent services. Customer satisfaction is our main goal. We welcome you to visit our showroom and office. We're looking forward to establish business relation with you.

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  • 316 Stainless Steel Threaded Flanges

    316 Stainless Steel Threaded Flanges

    Longquan is a professional 316 stainless steel threaded flanges manufacturer and supplier in China. Our main projects including stainless steel flanges, duplex steel flanges, super duplex steel flange, pipe fitting manufacturing and sales. We have produced 316 stainless steel threaded flanges for many years, looking forward to reaching a long-term cooperative relationship with you.
  • S32750 Duplex Steel Flanges

    S32750 Duplex Steel Flanges

    Longquan is a professional S32750 duplex steel flanges manufacturer and supplier in China. Our main projects including stainless steel flanges, duplex steel flanges, super duplex steel flange, pipe fitting manufacturing and sales. We have produced S32750 duplex steel flanges for many years, looking forward to reaching a long-term cooperative relationship with you.
  • F53 Duplex Steel Flanges

    F53 Duplex Steel Flanges

    Longquan is a large-scale F53 Duplex Steel Flanges manufacturer and supplier in China. The following is an introduction to F53 Duplex Steel Flanges, I hope to help you better understand F53 Duplex Steel Flanges. Welcome new and old customers to continue to cooperate with us to create a better future together! We hope to establish friendly cooperative relationship with your company with high quality products, reasonable price, considerate service and create a better future hand in hand.
  • 304 Stainless Steel Blind Flanges

    304 Stainless Steel Blind Flanges

    304 stainless steel Blind flanges plays the role of isolation and cutting, and the role of the head, tube cap, welding plug is the same. Because of its good sealing performance, for the need to isolate the system, generally as a reliable isolation means. A plate plate blind plate is a solid circle with a handle used in normally isolated systems.
  • 316 Stainless Steel Plate Flange

    316 Stainless Steel Plate Flange

    Longquan is a large-scale 316 stainless steel plate flange manufacturer and supplier in China. We have been specialized in stainless steel flanges, duplex steel flanges, super duplex steel flange, pipe fitting for many years. 316 stainless steel plate flange has a good price advantage and cover most of the European and American markets. We look forward to becoming your long-term partner in China.
  • S32750 Super Duplex Steel Weld Neck Flanges

    S32750 Super Duplex Steel Weld Neck Flanges

    We are one of the Professional S32750 super duplex steel weld neck flanges manufacturers Exporter Pipeline products in China .Our company was established in 2000, the plant covers 550, 000 square meters and a construction area of 6,8,000square meters, existing 260 workers and 45 technicians. We have five branch factories which can supply the best quality pipes, tubes, fittings flanges and related accessories
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  • Reviews

  • What are Threaded Flanges?

    Threaded flanges are a type of flange that is used in piping systems. They have threads on the inside and outside of the flange, allowing them to be easily screwed onto the pipe. Threaded Flanges are commonly used in low-pressure piping systems and in situations where welding is not possible.

  • Tee Pipe Fitting, a must-have for home decoration?

    Tee Pipe Fitting is usually made of materials such as copper, stainless steel or PVC. Copper and stainless steel are highly praised for their corrosion resistance and sturdiness, while PVC is favored by many families because of its low cost and easy installation. No matter what material it is, a good quality Tee Pipe Fitting can ensure the long-term stable operation of the pipeline system and provide solid protection for family safety.

  • What are the uses and applications of stainless steel flanges?

    Stainless steel flanges are important fittings for connecting two sections of pipes, ensuring smooth fluid flow. It is suitable for various pipeline systems, including petrochemical, chemical, pharmaceutical and other fields.

  • Common types of stainless steel flanges used

    There are currently many common types of stainless steel flanges used, but the basic types can be divided into the following three:Integrated stainless steel flange. Due to the fact that these stainless steel flanges are usually tapered necks, they are also known as long necked stainless steel flanges or neck stainless steel flanges. Commonly found on valves, it is produced together with valves.

  • How can duplex steel achieve "biphasic strength and toughness"?

    At present, Longquan Industrial has provided over 500,000 duplex steel flanges to more than 80 countries around the world, covering leading enterprises such as BP, Shell and petrochina.Longquan Industrial holds international certifications such as ASME U/U2, PED, and API 6A. It is equipped with a German SMS forging line and an American Niton spectrometer, achieving full traceability from raw materials to finished products. In the future, Longquan will continue to invest in the research and development of duplex steel materials, promoting the upgrading of flanges towards higher strength, lighter weight and greater intelligence.

  • The Features of Weld Neck Flanges for Piping Applications

    Weld neck flanges are an essential component in many piping systems. They provide a secure and leak-tight connection between pipes and other equipment, such as valves and pumps. Weld Neck Flanges are similar to slip-on flanges but have a neck that extends from the flange body. This neck welds the flange to the pipe, providing additional strength and support.

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