What is ASME Dished Heads? from China Henan Guojiang Precision Formed Head Co., Ltd.
ASME Dished Heads Means Dished Heads from a Factory or a Manufacturer with Certificates of ASME, Also an Official ASME U-Stamp Holder Factory or Manufacturer, Just Like Henan Guojiang Precision Formed Head Co., Ltd. from China.
Henan Guojiang precision Formed Head Co., Ltd is a Certified Official ASME U-Stamp Holder Manufacturer of Stainless Steel Dished Heads, Means We Can Produce Dished Heads with ASME Code, Which is Meet With Worldwide Application for Global Industrial Pressure Vessels.
If you are looking for Pressure Vessel Dished Heads for Petrochemical, Cryogenic, Food Processing or Energy Industries, ASME Dished Heads are the Most Widely Recognized Safety-Certified End Closures for Cylindrical Tanks and Reactors. Also called Flanged and Dished (F&D) Deads or Torispherical Dished Ends, ASME Dished Heads are Curved Metal Caps Engineered to Seal Pressure Vessels while Evenly Distributing Internal Fluid and Gas Stress Across the Curved Surface.
Unlike Generic Non-code Dished Heads, ASME Dished Heads are fully Designed, Fabricated, Inspected and Tested Per the ASME Boiler and Pressure Vessel Code (BPVC), Section VIII Division 1, the Global Standard for Unfired Pressure Vessels. Any Manufacturer Supplying Certified ASME Dished Heads Must Hold a Valid ASME U-Stamp Authorization, Verifying Full Compliance with Strict Engineering, Material and NDT Inspection Rules.
All certified ASME Dished Heads Strictly Follow ASME BPVC Section VIII Division 1, With Mandatory Code Requirements Covering Every Production Stage:
(1). Design Calculation Rules.
- Predefined Crown & Knuckle Radius Geometry Limits for Torispherical Dished Heads.
- Standardized Allowable Stress Values for Carbon Steel, Stainless Steel and Alloy Plate.
- Mandatory Wall Thickness Reduction Calculation to Compensate for Hot/Cold Forming Thinning.
- Joint Efficiency and Welding Design Specifications for Head-Shell Connections.
(2). U-Stamp Certification Requirement
- The ASME U-Stamp is The Official Certification Mark for Compliant Dished Heads. Only Manufacturers with ASME Authorized Inspection Agency (AIA) Audit Approval Can Produce U-Stamp Dished Heads. Every Finished ASME Dished Head is Fully Traceable With Furnace Heat Numbers, fForming Records and NDT Inspection Reports to Match ASME Traceability Mandates.
(3). Mandatory Inspection & Testing (ASME Code Required)
100% Raw Material Traceability with Heat Number Certification (EN 10204 3.1 Material Test Certificates Supplied for All Orders)
Full Dimensional Tolerance Inspection for Crown Radius, Knuckle Radius, Skirt Length and Wall Thickness.
Non-Destructive Testing (NDT): UT Ultrasonic Plate Inspection, (RT) Radiographic Testing and (PT) Penetrant Testing on Formed Heads and Welded Segments.
Post-Forming Heat Treatment (Stress relieving, Normalizing) for Carbon Steel Dished Heads per ASME SA-370 Standards.
Hydrostatic Pressure Testing to Validate Pressure Resistance Before Delivery.
Henan Guojiang is a professional ASME & PED certified manufacturer of dished heads. We boast large production capacity, fully qualified ASME-compliant heads and guaranteed on-time delivery.
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