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Flanges · Pipes · Fittings

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        • Class 150 Blind Flange
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        • Class 600 Blind Flange
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        • Class 900 Blind Flange
    • ASME/ANSI B16.5Expand
      • ANSI B16.5 Class 150 Flanges
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YANHAO
YANHAO
Flanges · Pipes · Fittings

Threaded Flanges

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  • Our Supply Range

    • Dimensions: 1/2”, 2”, 3”, 4”, 6”, 8”, 10”, Customized  up to 24”
    • Material: Carbon, Alloy and Stainless Steel
    • Thickness: Schedule 10(S) to SCH 160
    • Standard: ASME, ANSI, DIN, JIS, EN, etc
    • Class Range: Class 150 to 2500 (# or LB). PN 2.5 to PN 250.
    • Flange Face Type: RF, FF, MFM, TG, RJ
    • End: plain end
    • Connection: threaded
    • Manufacturing Process: Forging
    image 34

    Service & Support

    WhatsApp: +86 13313073735
    Email: flanges.yh@gmail.com

    China Threaded Flanges Supplier

    We provide flange products of various standards, such as ASME/ANSI B16.5, EN, DIN, JIS standards, etc. We also provide customized threaded flange products.

    As a company with 25 years of flange production experience, we support all types of flanges, and we can give you the best product quality, the most reasonable price.

    Quick Consultation
    Customize Flanges

    Please enjoy a copy of our online fashion catalog:

     Download Industrial Flange Catalog
    Quick Link
    • Threaded Flange Specifications
    • Threaded Flange Materials & Grades
    • Threaded Flanges Dimensions
    • Customized Threaded Flanges Process
    • Image Gallery
    • What is Threaded Flanges
    • About YANHAO
    • Quality Testing & Certificates
    • FAQs
    • More Types of Flanges

    Threaded Flange Specifications

    StandardTypeClassSize
    ASME B16.5WN/LWN/SO/Blind/Lap Joint150#-2500#1/2″-24″
    ASME B16.47 Series AWN/blind flange150# -900#22″-60″
    ASME B16.47 Series BWN/blind flange75# 400# 600#26″-60″
    900#26″-48″
    EN1092-1:2002Plate flange for welding/loose platePN2.5-PN100DN10-DN4000
    flange with weld-on plate collar or
    for lapped pipe end/Blind/WN flange
    JIS B2220Welding Flange, Lap joint flange, threaded flangePN6-PN100DN10-DN1500
    BS4504 BS10 TableD/EPlate Flange for welding/WN flange/Blank FlangePN6-PN100DN10-DN1500
    Sealing SurfaceRF, FF, MFM, TG, RJ
    CoatingVanish, yellow paint, anti-rust oil, galvanizing etc

    Threaded Flange Materials & Grades

    Threaded flanges are available in a variety of materials. These materials must meet the standards. The material should also meet the quality specified by ASTM or ASME standards. The thickness and inner diameter of the flange depend on the size of the pipe for which this Threaded flange is manufactured.

    Carbon steel flanges are commonly used manufacturing materials for Threaded flanges. You can choose the appropriate material according to the medium of the pipeline. You can choose ASTM A105 for normal temperature, ASTM A350 for low temperature, and ASTM A694 for high temperature.

    Flanges are available in a variety of grades, such as ASME B16 5, ASME B16 47 “A” series and “B” series to meet the needs of customers and industries.

    In addition to this material, Threaded flanges are also available in stainless steel and alloy steel, which have material properties such as corrosion resistance, high temperature resistance, and wear resistance. At the same time, we also have duplex steel materials to meet the technical requirements of various pipelines of customers. The following table shows the grades of these common materials:

    MaterialGrade
    Carbon SteelASTM A105, 20#, Q235, 16Mn, ASTM A350 LF1, LF2 CL1/CL2, LF3 CL1/CL2, ASTM A694 F42, F46, F48, F50, F52, F56, F60, F65, F70
    Alloy SteelASTM A182 F1, F5a, F9, F11, F12, F22, F91, A182F12, A182F11, 16MnR, Cr5Mo, 12Cr1MoV, 15CrMo, 12Cr2Mo1, A335P22, St45.8/Ⅲ;
    Stainless SteelASTM A182 F304, 304L, F316, 316L, 1Cr18Ni9Ti, 0Cr18Ni9Ti, 321, 18-8;
    Duplex and Super DuplexASTM/ASME A/SA 182 F44, F45, F51, F53, F55, F60, F61,
    S31803, S32205, S32550, S31254, SMO254, S32750, S32760, S32950
    Nickel Alloy SteelASTM/ASME B/SB151 UNS N07060, 71500, C70600 (CuNi 90/10), C71500 (CuNi 70/30)
    UNS N08825( INCOLOY 825), UNS N06600(INCONEL 600), UNS N06601(INCONEL 601),
    UNS N06625(INCONEL 625), UNS N10276(HASTELLOY C276)
    ASTM/ASME B/SB151 UNS N07060, 71500, C70600 (CuNi 90/10), C71500(CuNi 70/30)
    Copper AlloyASTM/ASME B/SB151 UNS N07060, 71500, C70600 (CuNi 90/10), C71500 (CuNi 70/30)
    TitaniumASTM/ASME B/SB381 Grade 2, Grade 5, Grade 7

    Threaded Flanges Dimensions

    Below we have listed some sizes of Threaded Flanges (Class 150) under ASME B16.5 (1/2″ to 24″)

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      ASME B16.5 Class 150 Flanges | Threaded
    • 1/2″ NPS flange with 1/2″ NPT threads has an outer diameter of 3.50″. The raised face thickness is 0.62″ and has 4 bolt holes.
    • 3/4″ NPS flange with 3/4″ NPT threads has an outer diameter of 3.88″. The raised face thickness is 0.62″ with 4 bolt holes.
    • 1″ NPS flange with 1″ NPT threads has an outer diameter of 4.25″. The raised face thickness is 0.68″ and the standard bolt holes are 4 numbers.
    • 2″ NPS flange with 2″ NPT threads has an outer diameter of 6.00″. The raised face thickness is 1.00″ and the flange has 4 bolt holes.
    • 5″ NPS flange with 5″ NPT threads has an outer diameter of 10.00″. The raised face thickness is 1.44″, and it has 8 bolt holes.
    • 6″ NPS flange with 6″ NPT threads has an outer diameter of 11.00″. The raised face thickness is 1.56″, and it has 8 bolt holes.
    • 10″ NPS flange with 10″ NPT threads has an outer diameter of 16.00″. The raised face thickness is 1.94″, and it has 12 bolt holes.
    • 20″ NPS flange with 20″ NPT threads has an outer diameter of 27.50″. The raised face thickness is 2.87″, and it has 20 bolt holes.
    • 24″ NPS flange with 24″ NPT threads has an outer diameter of 32.00″. The raised face thickness is 3.23″, and it has 20 bolt holes.

    Standardized Threaded Flanges

    • Threaded Flanges are commonly standardized as ASME B16.5, with sizes ranging from 1/2 inch to 60 inches.
    • Sealing surface types include raised face (RF), flat face (FF), dimpled face (MFM), tongue and groove (TG), ring joint (RJ), and so on.
    • Applicable pressure classes include Class 150, 300, 400, 600, 900, 1500.
    ASME B16.5 Threaded Flanges
    Class 150Class 600
    Class 300Class 900
    Class 400Class 1500

    Customized Threaded Flanges Process

    The following options are for you to customize. If you don’t have a design drawing, you can also consult our engineers and let us help you draw it.

    size

    Specified pipeline size, including flange ID and OD, thickness, bolt hole diameter, bolt hole distance, etc.

    Material

    Using specified material suitable for pipeline engineering according to your requirements.

    Shape

    can be customized with irregular flanges such as square flanges and conical flanges, etc.

    Connection

    Threaded connection, welding connection, socket welding connection, etc., which can be selected.

    Special Treatment

    Special treatments such as surface coatings and anti-corrosion can be made according to your needs.

    The customization process for flanges is generally as follows:

    1

    requirements
    Confirmation

    Communicate in detail to determine the requirements for flange size, material, pressure, connection method, etc.

    2

    Design drawings

    Our professional engineers will design flange drawings for you. The drawings will specify the size, shape, thickness, etc. of the flange in detail.

    3

    Choose materials

    Select suitable flange materials according to the requirements of the engineering project.

    4

    Customer confirmation

    Send detailed information, such as the designed drawings and materials, to the customer for confirmation.

    5

    Processing sample

    To ensure accuracy, first produce a sample according to the drawings and selected materials and send it to the customer for trial confirmation.

    6

    Production of bulk goods

    After confirming the accuracy of the samples, proceed with mass production.

    Customize it Now
    Free Consulting
    More reading:
    • ASME B16.47: Differences Between Series A & Series B Flange
    • How We Make A Flange: Flange Manufacturing Process

    Image Gallery

    Here are various Threaded flanges produced by YANHAO. You can click on the pictures to enlarge them. As a company with 25 years of flange production experience, YANHAO supports all types of flange production.

    Threaded Flange Product Image Gallery

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  • FAQs About Threaded Flange

    This video gives an explanation of threaded flanges.

    What is Threaded Flanges

    Threaded flanges are non-welded flanges that attach to pipes using threads. The procedure converts the flange’s inner hole into pipe threads, allowing for threaded pipe connections without the need for welding.

    Threaded flanges are easy to install and maintain, require no welding, and are suitable for pipelines where welding is not permitted on-site. The additional torque generated on the cylinder or pipe when the flange is deformed is minimal. However, the flange is thicker and more expensive, making it suitable for high-pressure pipeline connections.

    learn More: What Are Threaded Flanges? A Complete Overview

    ASME/ANSI B16.5 Threaded Flanges are widely used in low-pressure piping systems, as no welding is involved while connecting the flanges to pipes or other equipment. However, the Female Threaded flange may be welded around the joint after assembly, but it is not considered a satisfactory method of increasing its applications.

    Threaded connections are almost the polar opposite of flange connections. Rather than fitting pieces together using multiple parts, threaded connections are rimmed with matching grooves, one on the outside of a piece and the other on the inside.

    The key types of flanges are the welding neck, long welding neck, slip-on, socket weld, lap joint, and threaded, and blind flanges. In addition to these standard flanges, some special ones exist, called Weldoflange/Nipoflange and Elboflange, swivel flange, expander/reducer flange, and orifice flanges.

    A union is a threaded fitting that allows the pipework to be separated and reconnected without any horizontal movement in the pipe. It can be a standalone pipe fitting connecting two pieces of pipe, or an integral part of another fitting (such as a ball valve) that allows it to be separated.

    Threaded connections are often referred to as a process connection type. For Dwyer product specifications, this connection type is typically NPT (National Pipe Thread), which is an American standard thread. These connections allow products to be installed directly into piping or with the use of threaded fittings.

    About YANHAO

    Aerial view of YANHAO Factory
    Aerial view of YANHAO Factory

    YANHAO is a China Flange Manufacturer located in Hebei Province, China. It is one of the few professional Flange suppliers in China.

    We have many years of experience in flange production and have multiple flange production lines. We have sufficient stock of raw materials, rich inventory, fast delivery, and can ship within three days. At the same time, the price is affordable. You are welcome to consult and purchase!

    In addition, we can provide a variety of customized flanges and pipe fittings. Customers can give drawings or samples, and our company will produce them to fit your specific requirements.

    Learn more about YANHAO >>

    Our company was founded in 2000 and has more than 300+ employees, including 85+ middle and senior engineering and technical personnel. Our company has a number of production lines and covers an area of ​​150,000 square meters and a building area of ​​30,000 square meters.

    300+

    Number Of Workers

    85+

    Mid&Senior Engineers

    150,000

    Square Meters of Area

    25+

    Years of Experience

    • Panoramic View of The Factory
      Panoramic view of the factory
    • Elbow bending workshop
      Elbow bending workshop
    • raw material pipe storage
      raw material pipe storage
    • steel pipe storage workshop
      steel pipe storage workshop
    • Carbon steel seamless elbows pushed to the workshop
      seamless elbows pushed workshop
    • Carbon steel elbow shaping workshop
      Carbon steel elbow shaping workshop
    • Carbon steel elbow product storage workshop
      Carbon steel elbow product storage workshop
    • Finished flange waiting workshop
      Finished flange waiting workshop
    • Stainless steel pipe storage workshop
      Stainless steel pipe storage workshop
    • Stainless steel pipe fittings production workshop
      Stainless steel pipe fittings production workshop
    • Flange product storage workshop
      Flange product storage workshop
    • Butt welding pipe production process workshop
      Butt welding pipe fittings production process workshop
    • Elbow and flange product storage workshop
      Elbow and flange product storage workshop
    • Large diameter butt welding elbow bending workshop
      Large diameter butt welding elbow bending workshop
    • product waiting to be shipped packaging
      product waiting to be shipped packaging

    Our Production Line

    Our company has 8 pipe fitting production lines and 5 flange production lines. It has a full set of medium-frequency elbow hot-pushing machines, hot-die presses for reducers, cold-extrusion hydraulic presses for tees, forging hammers, vertical lathes, drilling machines, and other process-forming and mechanical processing equipment.

    Among them, the Φ1020 mm large-diameter medium-frequency hydraulic pushing machine, Φ1420 mm large-diameter medium-frequency bending machine, and Φ2438 mm 4,000-ton large hot-die press have an annual production capacity of more than 80,000 tons.

    8

    Pipe Fitting Production Lines

    5

    Flange Production Lines

    80,000 tons

    Annual Production Capacity

    • Elbow Forming Pushing Machine
      Elbow Forming Pushing Machine
    • Automatic Welding Machines
      Automatic Welding Machines
    • Hydraulic Butt Fusion Welding Machine
      Hydraulic Butt Welding Machine
    • Pipe Bending Machine
      Pipe Bending Machine
    • Cold Extrusion Tee Making Machine
      Cold Extrusion Tee Making Machine
    • Flange Lathe Machines
      Flange Lathe Machines
    • Heat treatment furnace
      Heat treatment furnace
    • Pipe Cleaning Shot Blasting Machine
      Pipe Cleaning Shot Blasting Machine
    Production equipment list

    Quality Testing & Certificates

    Our company is also equipped with a full set of physical and chemical testing, including spectrometer direct reading, non-destructive testing, heat treatment, water pressure testing, and other product quality testing equipment, providing a reliable guarantee for the production of high-quality products.

    • Metallographic Analyzer
      Metallographic Analyzer
    • Tensile Testing Machine
      Tensile Testing Machine
    • Thickness measurement
      Thickness measurement
    • Magnetic particle inspection
      Magnetic particle inspection
    • Hardness testing
      Hardness testing
    • Physical and chemical testing
      Physical and chemical testing
    • Impact test
      Impact test
    • Ultrasonic testing
      Ultrasonic testing
    • Low temperature testing
      Low temperature testing
    • Direct-Reading Spectrometer
      Direct-Reading Spectrometer
    Testing equipment list

    Check Our Certificates

  • Certificate for Material Manufacturer: ISO 14001:2015
    Certificate for Material Manufacturer: ISO 14001:2015
  • Certificate for Material Manufacturer: ISO 14001:2015
    Certificate for Material Manufacturer: ISO 14001:2015
  • Certificate for Material Manufacturer: ISO 14001:2015
    Certificate for Material Manufacturer: ISO 14001:2015
  • GB/T 19001-2016/ISO 9001:2015
    CQM: GB/T 19001-2016/ISO 9001:2015
  • GB/T 45001-2020/ISO 45001:2018
    CQM: GB/T 45001-2020/ISO 45001:2018
  • GB/T 24001-2016/SO 14001:2015
    CQM: GB/T 24001-2016/SO 14001:2015
  • Q/SHS 0001.1-2001 Q/SY 1002.1-2013
    CQM: Q/SHS 0001.1-2001 Q/SY 1002.1-2013
  • FAQs

    Yes, we are a flange pipe fittings manufacturer located in Cangzhou, Hebei, China. Founded in 2000, we cover an area of ​​150,000 square meters, with a building area of ​​30,000 square meters. We currently have more than 300 employees and are a relatively large and powerful Chinese flange manufacturer.

    The company has 8 pipe fittings production lines and 5 flange production lines. It has a full set of medium-frequency elbow hot push machines, reducer hot mold presses, tee cold extrusion hydraulic presses, forging hammers, vertical lathes, drilling machines and other processing and machining equipment. Among them, the φ1020 mm large-diameter medium-frequency hydraulic push machine, φ1420 mm large-diameter medium-frequency bending machine, and φ2438 mm 4,000-ton large-scale hot mold press have an annual production capacity of more than 80,000 tons.

    For standard models, our factory has a large inventory, and the delivery time is usually only a few days. For non-standard parts, we also have a large reserve of raw materials and multiple production lines, which will save one-third of the time compared to other manufacturers and ship them to you as soon as possible.

    We have our own testing system. Each batch of goods will have a corresponding product certificate and quality inspection report. At the same time, we have ISO9001 product quality certification, classification society certificate, ASNE quality certificate and other international authoritative quality certification certificates. We will never ship out unqualified products. In addition, we support customers to entrust third-party inspection companies for inspection and acceptance.

    Of course, you can provide us with drawings or samples for customization, or you can ask us to design and customize your exclusive flange pipe fittings for you. Learn More>>

    Our products are used in oil, gas, chemical industry, machinery, shipbuilding, aerospace, electricity, pharmaceuticals, construction engineering, water conservancy engineering, and marine engineering. Don’t worry about some special fields with high requirements. We have strong production capacity and rich production experience and can provide you with professional solutions. You can send us your working conditions and we can give you a solution for free.

    Our company can provide you with samples for free, you can contact sales to request samples.

    Of course, you are very welcome to visit our factory. We will also arrange meals and accommodation for you. If you have enough time, we can also take you to visit China’s famous mountains and historical sites, so that you can better understand China and our culture. It will be worthwhile and we look forward to seeing you.

    202404223 1

    Middle Eastern customers visit Yanhao pipe fittings factory

    A company in the Middle East that specializes in providing services for petroleum sent a representative to our Chinese flange factory in April 2024. After a long inspection, the customer…
    Read More Middle Eastern customers visit Yanhao pipe fittings factory

    We are the source manufacturer. If you have the strength, you will get more favorable prices, faster delivery and more guarantees if you purchase directly from us. We will have professional sales staff to track customers’ orders throughout the process, update the order status in real time, and let customers know their order progress and product quality in real time.

    We support payments in over 40 currencies worldwide.

    We have a long-term logistics transportation company that supports sea, land and air transportation to ensure that customers receive the goods on time. At the same time, if customers have a cooperative logistics company, we will still fully cooperate with your logistics company to ensure that customers can receive the goods as soon as possible.

    More Types of Flanges

    weld neck flanges
    Weld Neck Flanges (WN)

    WN flange, also known as a trapped hub flange or high-hub flange, is a high-stress-containing flange. Its circular fitting component, the rim, is fitted around the circumference.

    China welding neck flange products >>

    Learn More
    slip-on flanges
    Slip-on Flanges (SO)

    Slip-on flanges, as the name shows, can be easily slipped onto the end of a pipe or fitting and then welded in place. It usually has a flat face and a protruding face.

    China slip-on flange products >>

    Learn More
    Socket Weld Flanges (SW)
    Socket Weld Flanges (SW)

    Socket Weld Flanges (SW) are similar to Slip-on Flanges (SO). The difference is that there is an extra piece in the middle.

    China socket weld flange products >>

    Learn More
    blind flanges
    Blind Flanges (BF)

    Blind flange is also called flange cover. It is a flat, circular plate used to cover the ends of pipes, valves, or joints.

    China blind flange products >>

    Learn More
    Socket Weld Flanges (SW)
    Lap joint flange (LJ)

    Consisting of two components: a stub end and a lap joint ring flange. The respective stub end is slid into the flange’s bore, and the stub end is joined to the pipe through butt welding.

    China lap joint flange products >>

    Learn More
    Threaded flanges
    Threaded Flanges (TF)

    Threaded flanges are pipe flanges with internal threading to match external threads on a pipe.  The installation does not involve welding

    China threaded flange products >>

    Learn More

    Having Questions? Contact Now!

    • Tel: +86-133-1307-3735
    • Email Us: sales@yanhaocn.com
    • Whatsapp:  +86 13313073735

    As a leading Chinese flange manufacturer, we are committed to delivering superior-quality pipe flanges at competitive prices.

    Our extensive experience and cutting-edge production technology ensure that our products meet the highest industry standards.

    We pride ourselves on our ability to provide tailored solutions to meet the diverse needs of our clients, ensuring that our flanges are perfectly suited for a wide range of applications.

    Trust us to be your reliable partner for all your flange requirements.

    Service

    • Custom Flanges

    Flange Types

    • Weld Neck Flanges
    • Socket Weld Flanges
    • Slip-On Flanges
    • Lap Joint Flanges
    • Threaded Flanges
    • Blind Flanges

    Flange Materials

    • Stainless Steel Flanges
    • Carbon Steel Flanges
    • Alloy Steel Flanges

    Flange Standards

    • B16.47 Flanges
    • B16.5 Flanges
    • EN Standard Flange

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    • Home
    • Flanges
      • ASME/ANSI B16.47
        • Series A
          • Class 150 Welding Neck
          • Class 150 Blind Flange
          • Class 300 Welding Neck
          • Class 300 Blind Flange
          • Class 400 Welding Neck
          • Class 400 Blind Flange
          • Class 600 Welding Neck
          • Class 600 Blind Flange
          • Class 900 Welding Neck
          • Class 900 Blind Flange
        • Series B
          • Class 75 Welding Neck
          • Class 75 Blind Flange
          • Class 150 Welding Neck
          • Class 150 Blind Flange
          • Class 300 Welding Neck
          • Class 300 Blind Flange
          • Class 400 Welding Neck
          • Class 400 Blind Flange
          • Class 600 Welding Neck
          • Class 600 Blind Flange
          • Class 900 Welding Neck
          • Class 900 Blind Flange
      • ASME/ANSI B16.5
        • ANSI B16.5 Class 150 Flanges
        • ANSI B16.5 Class 300 Flanges
        • ANSI B16.5 Class 400 Flanges
        • ANSI B16.5 Class 600 Flanges
        • ANSI B16.5 Class 900 Flanges
        • ANSI B16.5 Class 1500 Flanges
        • ANSI B16.5 Class 2500 Flanges
      • Flange types
        • Weld Neck Flanges
        • Slip-On Flanges
        • Blind Flanges
        • Lap Joint Flanges
        • Socket Weld Flanges
        • Threaded Flanges
      • Flange Standard
        • ANSI Flange Standard
        • ASME Flange Standard
        • EN Flange Standard
      • Custom Flanges
      • Flange Material
        • Stainless Steel Flanges
        • Carbon Steel Flanges
        • Alloy Steel Flanges
    • Fittings
      • Pipe Elbow
        • 45-Degree Long Radius Elbow
        • 90-Degree Long Radius Elbow
        • 180 Degree Long Radius Bend
        • 45-degree Elbow Pipe Fitting
        • 90-Degree Short Radius Elbow
        • 180-Degree Short Radius Bend
      • Pipe Cap
      • Pipe Reducer
      • Pipe Tee
      • Pipe Cross
    • Pipes
      • Insulated Steel Pipe
      • Anti-corrosion Steel Pipe
    • About Us
      • Blog
      • Help Center & FAQ
      • Project cases
      • Downloads
    • Contact