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304 Duplex Stainless Steel Pipe Fittings 45 Degree Elbow For Pipeline ISO9001

Categories Duplex Stainless Steel Pipe Fittings
Brand Name: HT
Model Number: SS 304
Certification: PED/ISO
Place of Origin: China
MOQ: 1pcs
Payment Terms: L/C, D/A, D/P, T/T, Western Union, MoneyGram
Supply Ability: 1000 month
Delivery Time: 5-8 days
Packaging Details: Seaworthy Plywood\wooden Pallets
Product name: stainless steel compression fittings elbow
Application: pipeline project
Packing: Seaworthy Plywood\wooden Pallets
Standard: ANSI JIS DIN ASME
Place of Orig: Henan China
Certificate: ISO9001:2008
Dimensions: Customers'demand
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    304 Duplex Stainless Steel Pipe Fittings 45 Degree Elbow For Pipeline ISO9001

    Seamless 304 Stainless Steel Compression Fittings Elbow For Pipeline Project

    1.Difference between SMLS pipe fittings and welded pipe fittings

    In general, the quality of seamless stainless steel pipe fittings is better than that of seamless stainless steel pipe fittings, because the seamless stainless steel pipe fittings are made of the accurate cold-rolled sheet that has passed the inspection, so any defect is limited to the welding position. Seamless tube is made of stainless steel by punching, which leads to many tears in the tube wall formed by extrusion. The eddy current test shows that the defective rate of stainless steel tube with seam is usually lower than that of seamless stainless steel tube. Using ultrasonic testing, the background noise of seamless stainless steel pipe is so large that it is difficult to find its defects. However, the background noise of stainless steel pipe with seam is very low, so it is easy to find the defect.


    2.About Stainless steel 304:

    Dual certified 304/304H is used as a material of construction up to 1500°F. Slight scaling begins at about 1200°F. This is the 0.04% minimum carbon version of type 304 stainless. It has general corrosion resistance similar to the low carbon 304/304L. However, it is subject to carbide precipitation in the heat affected zone (HAZ) of welds. Weldments may be sensitive to HAZ intergranular corrosion in oxidizing acid environments, and to polythionic acid stress corrosion cracking. The carbide precipitation is not harmful to high temperature mechanical properties.
    304/304H is welded using the 22Cr 11Ni filler wire (ER308), or covered electrodes (E308). Post-weld heat treatment is not necessary for most high temperature service.
    Chemistry

    Cr


    Ni


    C


    Mn


    Si


    P


    S


    Fe


    MIN


    18.0


    8.0


    0.04







    MAX


    20.0


    10.5


    0.10


    2.0


    0.75


    0.04


    0.03


    Balance


    Specifications
    AMS 5513
    ASME SA 240
    ASTM A 240, ASTM A 959
    EN 1.4301
    UNS S30400, UNS S30409
    W. Nr./EN 1.4948
    Werkstoff 1.4301
    Inventory
    304 / 304H Plate, 304 / 304H Welding Products
    Common Trade Names
    304H Stainless
    Features
    Elevated temperature service to 1500°F
    Corrosion resistance similar to 304/304L
    Applications
    Pressure Vessels
    Petrochemical Equipment
    Physical Properties
    Density: 0.285 lb/inch3
    Temperature, °F 212 1600
    Coefficient* of Thermal Expansion, in/in°F x 10-6 9.4 –
    Thermal Conductivity Btu • ft/ft2 • hr • °F 9.4 10.9
    * 70°F to indicated temperature.
    Mechanical Properties
    Representative Tensile Properties

    Minimum


    Typical


    Ultimate Tensile Strength, ksi


    75


    90


    0.2% Yield Strength, ksi


    30


    35


    Elongation, %


    40


    60


    Maximum Allowable Stresses, ASME Section VIII, Div 1 Temperature, °

    Temperature, °F


    200


    400


    600


    800


    1000


    1200


    1400


    1500


    stress, ksi


    20.0


    18.3


    16.6


    15.2


    14.0


    6.1


    2.3


    1.4


    3.Quality assurance system:


    4.Seamless elbow processing technology:


    Seamless elbow: elbow is a kind of pipe fitting used for pipe turning. Of all the pipe fittings used in the pipeline system, the proportion is the largest, about 80%. Generally, different forming processes are selected for elbows with different materials or wall thicknesses. The forming process of seamless elbow commonly used in the manufacturer includes hot pushing, stamping, extrusion, etc. The hot push elbow forming process is a process in which a special elbow pushing machine, a core die and a heating device are used to make the blank sheathed on the die move forward under the push of the pushing machine and be heated, enlarged and bent during the movement. The deformation characteristic of the hot push elbow is to determine the diameter of the tube blank according to the law that the volume before and after the plastic deformation of the metal material is constant. The diameter of the tube blank used is smaller than the diameter of the elbow. The deformation process of the blank is controlled by the core die, so that the metal compressed at the inner arc flows and compensates to other parts thinned due to the expansion, so as to obtain the elbow with uniform wall thickness.


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