<bdo id="oo0km"></bdo>
  • <table id="oo0km"><source id="oo0km"></source></table>
  • <noscript id="oo0km"><kbd id="oo0km"></kbd></noscript>
    <menu id="oo0km"></menu>
  • ?


    A fitting is a weldable pipe fitting that allows for change of direction of flow, to branch off, reduce pipe size or attach auxiliary equipment.

    Pipe fitting is the occupation of installing or repairing piping or tubing systems that convey liquid, gas, and occasionally solid materials.

    U-bend tubes

    Each U bend tube of our range is rigorously quality checked by our team of talented professionals on every stage of production to deliver the clients defect free best quality products.

    Tubes for heat exchangers are made of steel according to:

    Piping Expansion Joint Construction
    End connections

    There are four different type of connections that are used for fittings:

    • Butt Weld Fittings – Probably the most common type of fitting. They are easily manufactured and are easily installed. Butt weld fittings can be connected directly to each other. This is called fitting make up.
    • Flanged Fittings – Flanged fittings are piping components where the flange is an integral component of the fitting. These are most often used in water treatment applications or lined piping where welding would be destructive to the liner.
    • Socket Weld Fittings – These fittings have a socket weld connection on each end. They might be used for smaller diameter piping. These fittings utilize a single fillet weld to join the piping with the fitting.
    • Threaded Fittings – Threaded fittings are generally four inches and smaller. The reason for this size constraint is the pipe end needs to be threaded with a male type connection and die sizes are unobtainable in the larger diameters.
    Fitting Weights
    ASME buttweld fitting specifications do not specify weights for fittings.

    Weights quoted in the tables on this page are based on manufacturers information and should be considered as approximate and provided as a guide only (fitting weights can vary considerably between manufacturers due to differences in construction).

    Three groups:

    Fittings are divided into three groups:

    • Buttweld (BW) fittings whose dimensions, dimensional tolerances et cetera are defined in the ASME B16.9 standards. Light-weight corrosion resistant fittings are made to MSS SP43.
    • Socket Weld (SW) fittings Class 3000, 6000, 9000 are defined in the ASME B16.11 standards.
    • Threaded (THD), screwed fittings Class 2000, 3000, 6000 are defined in the ASME B16.11 standards.

    Chemical Analysis(%) For Part Standard

    Standard Grade C Si Mn P S V Nb Ti Cr Mo Ni Al Nb N Others
    max max max max max max max max max max max max max max max
    0.04–0.09 W 1.5–2.00 B
    ASTM A420/A420M
    Steel No. Type Chemical composition
    C Si S P Mn Cr Ni Mo Other ób ós δ5 HB
    WPL6 0.3 0.15-0.3 0.04 0.035 0.6-1.35 0.3 0.4 0.12 Cb:0.02;V:0.08 415-585 240 22
    WPL9 0.2 0.03 0.03 0.4-1.06 1.6-2.24 435-610 315 20
    WPL3 0.2 0.13-0.37 0.05 0.05 0.31-0.64 3.2-3.8 450-620 240 22
    WPL8 0.13 0.13-0.37 0.03 0.03 0.9 8.4-9.6 690-865 515 16
    ASTM A815/A815M
    Steel No. Standard No. Type Chemical composition
    C Si S P Mn Cr Ni Mo Other ób ós δ5 HB
    UNS S31803 ASTM A815/A815M 0.03 0.1 0.02 0.03 2 21-23 4.5-6.5 2.5-3.5 N:0.08-0.2 620-795 450 25 290
    ASTM A105/A105M
    Steel No. Type Chemical composition
    C Si S P Mn Cr Ni Mo Other ób ós δ5 HB
    A105 0.35 0.1-0.35 0.04 0.035 0.6-1.05 0.3 0.4 0.12 V:0.05;Nb:0.02 485 250 22 187 ψ%:30
    ASTM A182/A182M
    Steel No. Type Chemical composition
    C Si S P Mn Cr Ni Mo Other ób ós δ5 HB
    F11 CL1 0.05-0.15 0.5-1 0.03 0.03 0.3-0.6 1-1.5 0.44-0.65 415 205 20 121-174 ψ%:45
    F11 CL2 0.1-0.2 0.5-1 0.04 0.04 0.3-0.8 1-1.5 0.44-0.65 485 275 20 143-207 ψ%:30
    F11 CL3 0.1-0.2 0.5-1 0.04 0.04 0.3-0.8 1-1.5 0.44-0.65 515 310 20 156-207 ψ%:30
    F12 CL1 0.05-0.15 0.5 0.045 0.045 0.3-0.6 0.8-1.25 0.44-0.65 415 205 20 121-174 ψ%:45
    F12 CL2 0.1-0.2 0.1-0.6 0.04 0.04 0.3-0.8 0.8-1.25 0.44-0.65 485 275 20 143-207 ψ%:30
    F304 0.08 1 0.03 0.045 2 18-20 8-11 N:0.1 515 205 30 ψ%:50
    F304H 0.04-0.1 1 0.03 0.045 2 18-20 8-11 515 205 30 ψ%:50
    F304L 0.035 1 0.03 0.045 2 18-20 8-13 N:0.1 485 170 30 ψ%:50
    F316L 0.035 1 0.03 0.045 2 16-18 10-15 2-3 N:0.1 485 170 30 ψ%:50
    F317 0.08 1 0.03 0.045 2 18-20 11-15 3-4 515 205 30 ψ%:50
    F321 0.08 1 0.03 0.045 2 17-19 9-12 Ti:5C%-0.7 515 205 30 ψ%:50
    F347 0.08 1 0.03 0.045 2 17-20 9-13 Ti:10C%-1.1 515 205 30 ψ%:50
    ASTM A53/A53M
    Steel No. Standard No. Type Chemical composition
    C Si S P Mn Cr Ni Mo Other ób ós δ5 HB
    B ASTM A53/A53M 0.3 0.045 0.05 1.2 0.4 0.4 0.15 V:0.08 415 240 See sdandard
    ASTM A106
    Steel No. Type Chemical composition
    C Si S P Mn Cr Ni Mo Other ób ós δ5 HB
    B 0.3 0.1min 0.035 0.035 0.29-1.06 0.4 0.4 0.15 V:0.08 415 240 22
    C 0.35 0.1min 0.035 0.035 0.29-1.06 0.4 0.4 0.15 V:0.08 485 270 20
    ASTM A312/A312M
    Steel No. Type Chemical composition
    C Si S P Mn Cr Ni Mo Other ób ós δ5 HB
    TP304 0.08 0.75 0.03 0.04 2 18-20 8-11 515 205 35
    TP304H 0.04-0.1 0.75 0.03 0.04 2 18-20 8-11 515 205 35
    TP304L 0.035 0.75 0.03 0.04 2 18-20 8-13 485 170 35
    TP316L 0.035 0.75 0.03 0.04 2 16-18 10-15 2-3 485 170 35
    TP321 0.08 0.75 0.03 0.04 2 17-20 9-13 Ti:5C%-0.7 515 205 35
    ASTM A515/A515M
    Steel No. Type Chemical composition
    C Si S P Mn Cr Ni Mo Other ób ós δ5 HB
    60 0.24 0.13-0.45 0.035 0.035 0.98 415-550 220 25
    65 0.28 0.13-0.45 0.035 0.035 0.98 450-585 240 23
    70 0.31 0.13-0.45 0.035 0.035 1.3 485-620 260 21

    Tensile Property For Part Standard

    StandardGradeYield Strengh(Mpa)Tensile Strengh(Mpa)Hardness

    Tensile Property  For Part Standard

    Fittings applications and markets

    Pipe and pipe fittings go hand-in hand. Just as pipes are used for a variety of residential, public and industrial applications, so also the pipe fittings. No pipes can be connected without the use of proper fittings and flanges. Pipe fittings allow pipes to be installed and connected or joined where necessary and terminated in the right place.

    Such as Oil and gas industries, Midstream, Shipbuilding, Power plants, Food plants, Pharmaceuticals, etc.

    Pipe fittings include a wide range of products in various shapes, sizes and materials. With rapid developments in the field of industrial fittings and continuous research work in this industry, various new products are manufactured. Some fittings have certain special features so that they can be fabricated on different principles like hydraulics, pneumatic depending on the end usage. Fittings include a comprehensive range of products depending on various applications in which they are applied.

    Fittings are used wherever liquids, gases, chemicals and other fluids are created, processed, transported, or used.

    There is no end to applications of pipe fittings so long there is no end to the applications of pipes . While the list of piping applications continues to expand, its strength, flexibility, very good flow rates and high chemical resistance are qualities which are uniquely suited for the movement or transfer of liquids, steam, solids and air from one point to another.

    With piping, pipe fittings have many other uses like as follows:

    • The transfer of extremely hazardous materials such as chemical and waste.
    • Protection of sensitive equipment from high pressures.
    • Protection from corrosion and other extreme weather conditions.
    • Resistance to household and industrial chemicals.

    Considering the various purposes of pipe fittings, these pipe fittings are used in various industries like:

    • Chemical / Petrochemical
    • Municipal
    • Food, Beverage, and Dairy
    • Oil and Gas
    • Power
    • Process Instrumentation
    • Pulp and Paper
    • Semiconductor
    • Marine & dredging
    • Sanitation

    Important Points for selecting best carbon steel fittings

    If you have a new industrial project which includes pipe installation, you would want to select best material for laying down the pipes, elbows, flanges etc. In this context it would be useful to keep in mind a few of the following points:

    • Evaluate the magnitude of the project
    • Understand the scale of the implementation
    • Enumerate the liquids or gases the pipes are going to carry
    • The desired age or longevity of the structure

    These pointers will help u decide which metal to choose to lay down the pipes. Usually, steel is a popular choice, considering its characteristics. Additionally, in order to enhance the characteristics of steel, carbon or chrome is used. So, the carbon steel fittings become the perfect choice for industrial projects. The major benefits of using these carbon steel pipe fittings are:

    • Robustness to the product.
    • More the carbon, more the durability.
    • Improve the strength without losing the shape.
    • The proportion of carbon to steel can be morphed.
    • Rust resistant.

    Also with carbon steel pipe fittings,There is a wide variety of flanges available in the market today. However, making the right choice of flange to the right project becomes critical ss per the project requirements.weld neck flanges are good choices, If the project demands high temperatures or sub zero temperatures.

    This flange provides extra reinforcement.The flange fits perfectly into the internal diameter of the pipe and this helps to avoid all hitches in the flow of desired substances through the pipes.

    Thus, having a good knowledge of pipes as well as flanges that suit the requirements of a particular project, help you to select better material. This choice is critical for the perfect implementation of the project and durability, effectiveness and longevity of the implementation.Additionally, using the right kind of pipes and flanges during project implementation helps the project to pass the quality, efficiency as well as safety parameters.


    Even welding and smooth weld line, can be substitute for seamless tube after drawing and cold rolling.

    ASME B16.9

    This Standard covers overall dimensions, tolerances, ratings, testing, and markings for wrought factory-made buttwelding fittings in sizes NPS 1 ? 2 through 48 (DN 15 through 1200).

    Fittings may be made to special dimensions, sizes, shapes, and tolerances by agreement between the manufacturer and the purchaser.

    ASTM A234/ SA234M

    ASTM A234/ SA234M Standard specification for pipe fittings of wrought carbon steel and alloy steel for moderate and high temperature service.

    These fittings are for use in pressure piping and in pressure vessel fabrication for service at moderate and elevated temperatures.

    How a Butt Weld Fitting is Made?

    There are numerous processes for manufacturing butt weld fittings, several examples listed as follows.

    Extrusion method (Hot Forming)

    The hot-extrusion process consists of enclosing a piece of metal, heated to forging temperature, in a chamber called a "container" having a die at one end with an opening of the shape of the desired finished section, and applying pressure to the metal through the opposite end of the container.

    Mandrel method (Hot Forming)

    One of the most common manufacturing methods for manufacturing Elbows from pipes. After heating the raw material, it is pushed over a die called "mandrel" which allows the pipe to expand and bend simultaneously.

    Deep Drawing method

    One of the most common manufacturing methods for caps, where plate is cut out in a circle and formed by deep drawing.

    The regular fittings of A234 WPB pipe fittings are elbows, tees, reducers, caps, cross.


    Fitting specification, Standard and identification

    There are different varieties of pipe fittings made of various materials and available in various shapes and sizes.



    Our team are highly trained and experienced in servicing and producing all types of steel supplies. Whether you've got a large construction project, or need parts for industrial machinery, our team of steel fabrication consultants will ensure that your project is provided with the parts you need, when you need them.

    Copyright © 2011 Sunny Steel Enterprise Ltd.  All Rights Reserved ICP No.:08010763