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Fabricant et fournisseur de coudes à 90 degrés en acier inoxydable en Chine

    Stainless Steel 90 Degree Elbow Supplier in China

    A coude à 90 degrés en acier inoxydable is a critical plumbing and piping component designed to connect two separate pipes or tubes at a perpendicular angle,altering the direction of fluid,gas,or steam flow by exactly 90 degrees. Constructed from high-grade corrosion-resistant alloys,it is commonly utilized across severe industrial, marine, chemical,and food-processing environments.

    Core Structural Designs

    • Long Radius (LR) Elbow:
      The center-to-face dimension equals 1.5 times the nominal pipe diameter.It is widely favored for standard piping systems because it ensures a more gradual bend,minimizes friction loss,and lowers system pressure drops.
    • Short Radius (SR) Elbow:
      The center-to-face dimension is identical to the nominal pipe diameter.These “sharp turn” fittings are utilized when working within tight space constraints where a long radius cannot physically fit.
    • Reducing Elbow:
      Features different inlet and outlet diameters to seamlessly transition the line to a smaller or larger pipe size while changing direction.
    Stainless Steel 90 Degree Elbow in Stock

    Specifications For A 90 Degree Elbow

    Coude à 90 degrés en acier inoxydable
    Diamètre nominalOD at BevelCoude à 90
    DNNPSSérie ASérie BLRSR
    151/221.31838–
    203/426.92538–
    25133.7323825
    321.1/442.4384832
    401.1/248.3455738
    50260.3577651
    652.1/276.1(73)769564
    80388.98911476
    903.1/2101.6–13389

    Connection Methods For A Stainless Steel 90 Degree Elbow

    • Butt-Weld (BW):
      The ends are chamfered so they can be welded directly to pipes.This creates a seamless,leak-proof,continuous metal structure designed for highly critical, high-pressure,or high-temperature pipelines.
    • Threaded (NPT or BSP):
      Features internal female or external male threads.Commonly used in lower-pressure utility lines or plumbing setups where parts must be easily taken apart for maintenance.
    • Socket Weld (SW):
      The pipe slips directly into a recessed area of the fitting before being sealed with a fillet weld.This design is optimized for smaller pipe diameters managing high structural loads.

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    Kaysuns is a professional supplier of Stainless Steel 90 Degree Elbows.Please feel free to contact me if you have any requirements.

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    Ce que nous faisons

    Matériau

    Acier inoxydable

    AISI 304, 304L, 316, 316L, 316Ti, 317L, 321, 321H, 347, 347H, 904L, 254 SMO (W1.4301, 1.4306, 1.4948, 1.4401, 1.4404, 1.4571, 1.4438, 1.4541, 1.4878, 1.4550, 1.4845, 1.4539, 1.4547, etc.)

    Duplex et Super Duplex

    Duplex 2205 - S31803, S32205, super duplex 2507 - S32750, S32760 (w1.4462, 1.4410, 1.4501, 1.4507 etc.)

    Alliage à base de nickel

    Monel 400, Inconel 600, 625, Incoloy 800, 800H, 825, Alliage 20, Hastelloy B3, C22, C276, 254SMO, Cu/Ni 70/30, 90/10, etc.

    Autre alliage

    Alliage de cuivre C71500, C70600 (CuNi 90/10, CuNi 70/30 ), alliage de titane, alliage de chrome-moly A234 WP5, WP9, WP11, WP22, WP91 , alliage basse température A420 WPL6, etc.

    Stainless Steel 90 Degree Elbow Standards

    En tant que fabricant et fournisseur leader de coudes en acier inoxydable in China,we are able to seamlessly meet the standards and specifications of buyers from various countries.Our raw materials are sourced from top-tier steel mills both domestically and internationally,ensuring that cracks and inclusions are eliminated at the source.
    • ASME B16.9
    • ASME B16.11
    • MSS SP-43
    • DIN 2605
    • EN 10253-3 / EN 10253-4
    • GB/T 12459
    • GB/T 13401
    • JIS B2312 / JIS B2313
    • ASTM A403 / A403M
    • ASTM A182
    • ASTM A815
    • ASME BPE
    • 3-A Normes sanitaires
    • DIN 11852

    Surface Finishes For 90 Degree Stainless Steel Elbow

    In the manufacturing of 90 degree stainless steel elbows,surface treatment directly determines the product’s corrosion resistance,hygiene standards,fluid resistance,and visual appeal.Different applications have mandatory industry standards for surface roughness.

    Pickled & Annealed Finish - NO.1 / 2B

    After being formed by hot pushing or welding,elbows develop a black oxide scale on their surface.Pickling removes this scale,re-exposing the stainless steel surface and forming a dense,silvery-white passivation layer.
    Rune ≥ 2.5 μm.

    Sandblasted / Shot Blasted Finish

    Compressed air is used to propel quartz sand,glass beads,or stainless steel shot at high speed onto the surface of the elbow,removing impurities through mechanical impact and creating a uniform silver-gray surface texture.
    Rune ≈ 1.6 – 3.2 μm.

    Mechanically Polished Finish

    Use polishing wheels,sanding belts,or flap discs of varying grits to physically grind the surface of the elbow—particularly the inner walls or welds—progressing from coarse to fine.This creates a brushed/matt or mirror-like finish.
    Rune ≤ 0.5 – 0.8 μm.

    Electropolished Finish

    The elbow is used as an anode and placed in a specialized acidic electrolyte solution,where an electric current is applied.The electrochemical reaction preferentially dissolves microscopic protrusions on the surface of the elbow,resulting in a perfectly smooth and polished finish.
    Rune ≤ 0.13 – 0.38 μm.

    Sanitary SF1 - SF4

    In the field of international sanitary-grade pipe fittings,surface treatment is subject to extremely strict classification codes,and manufacturers must strictly adhere to these standards:
    SF GradeProcessing MethodMax Rune Limit
    SF1Polissage mécanique≤ 0.51 μm (20 μin)
    SF3Polissage mécanique≤ 0.76 μm (30 μin)
    SF4Electrolytic Polishing≤ 0.38 μm (15 μin)

    Black Oxide / PVD Coated Finish

    Using chemical blackening or physical vapor deposition (PVD) techniques,an extremely thin yet hard layer of metal compounds in various colors—such as black,gold,and rose gold—is formed on the surface of the elbow.
    Specifically designed for structural elbows used in high-end interior architecture,exhibition halls,and custom modern furniture.It is not part of standard industrial fluid piping practices.

    Applications for Stainless Steel 90 Degree Elbows

    • Raffineries de pétrole et de gaz
    • Chemical Processing Plants
    • Food and Beverage Manufacturing
    • Pharmaceutical and Biotech Cleanrooms
    • Génie maritime et offshore
    • Power Generation Stations
    • Water and Wastewater Treatment
    • Automotive and Aerospace Exhaust Systems
    • HVAC and Industrial Refrigeration
    • Commercial Architecture and Decorative Handrails

    FAQs About Stainless Steel 90 Degree Elbow

    A long-radius elbow has a bending radius equal to 1.5 times the pipe’s nominal diameter.It has a gentler curve, resulting in lower fluid resistance and pressure loss.A short-radius elbow has a bending radius equal to 1 times the pipe’s nominal diameter.It has a very sharp bend and high fluid resistance,and is used only in special applications where space is extremely limited and a long-radius elbow cannot fit.

    Butt-weld elbows feature beveled edges and are directly butt-welded to the pipe.This provides the strongest connection and is 100% leak-proof,making it suitable for critical industrial pipelines with large diameters,high pressure,and high temperatures.
    Socket-welding involves inserting the pipe directly into the socket of the elbow and then welding it from the outside.No pre-beveling is required,and alignment is easy.Suitable for high-pressure pipelines up to 2″.
    Threaded connections use NPT or BSP threads.No welding is required,making disassembly and maintenance convenient at any time.Suitable for medium- and low-pressure applications in residential,light industrial,or temporary,easily removable piping systems.

    We can provide material test reports for 100% of our stainless steel 90-degree elbows that comply with the EN 10204 3.1 standard.These reports include complete chemical composition analysis,mechanical property testing, and the results of hydrostatic testing or non-destructive testing.In addition,our factory is certified to ISO 9001 and holds CE/PED certification for pressure equipment.

    This is not a myth.Genuine austenitic stainless steel is indeed non-magnetic or weakly magnetic at room temperature.
    However,during the manufacturing process,elbows undergo intense mechanical cold working,hydraulic forming,bending,or stamping. During this deformation process,the austenitic structure inside the stainless steel undergoes localized microstructural transformations,resulting in strain-induced martensite. Martensite is ferromagnetic,so processed elbows will exhibit varying degrees of magnetism.
    This does not affect corrosion resistance in any way.If you have strict non-magnetic requirements,we can help eliminate this processing-induced magnetism through high-temperature solution annealing.

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