ASME U-Stamp Pressure Vessel | Carbon Steel & Stainless Steel Fabrication for Oil, Gas, Chemical & Power Industries – Custom Vertical/Horizontal Designs
Need a custom quote for Pressure Vessel? Contact our engineering team directly: jimmy@steelseamlesspipe.com
Product Description
Yuhong Group: Complete Pressure Equipment Solutions – From Components to Complete Vessels
Yuhong Group Co., Ltd. designs and manufactures a comprehensive range of thermal and pressure equipment for global industries. Our core offerings include shell and tube heat exchangers, pressure vessels, air coolers, and a complete supply of critical components: finned tube bundles, U-tube bundles, heat exchanger tubesheets, and all related parts – ensuring full support for new projects and maintenance.
Shown in the attached photographs is one of our pressure vessels – an ASME-coded unit designed for process containment, separation, or storage applications. This vessel showcases our fabrication capabilities for heavy-duty industrial service.
Product Focus: Pressure Vessel – Engineered for Process Containment & Safety
A pressure vessel is a closed container designed to hold gases or liquids at pressures substantially different from ambient. Our vessels serve a wide range of applications – from separation and storage to reaction and heat exchange.
Based on the images, this vessel exhibits:
- Configuration: Vertical or horizontal design (optimized for site layout)
- Material: Carbon steel (ASME SA516 Gr.70 typical) – providing strength and cost-effectiveness
- Construction: ASME Section VIII, Division 1 compliant with U-Stamp certification
- Features: Manways, nozzles, supports, lifting lugs for safe handling and installation
- Application: Process containment, separation, or storage
Key Components & Their Functions in a Pressure Vessel
| Component |
Material (Typical) |
Role in Equipment Performance |
| Shell |
Carbon steel (SA516 Gr.70) or stainless steel |
Primary pressure-containing boundary; designed for internal/external pressure. |
| Dished Heads |
Carbon steel (formed) or stainless steel |
End closures; designed for pressure containment; elliptical or torispherical shapes. |
| Manway |
Carbon steel or stainless steel |
Provides access for internal inspection, cleaning, and maintenance. |
| Nozzles & Flanges |
Forged (SA105, SA182) |
Process inlet/outlet, instrument connections, drain, vent. |
| Supports (skirt/legs/saddles) |
Structural steel |
Support vessel weight; designed for wind, seismic, and operational loads. |
| Lifting Lugs |
Carbon steel |
Facilitate safe lifting and installation. |
| Heat Exchanger Tube (internal coils) |
SA179 or stainless steel |
Provides heating/cooling surface inside the vessel. |
| Finned Tube Bundle (external) |
Tube + aluminum/SS fins |
For external heating/cooling or air-cooled applications. |
| U-Tube Bundle (internal) |
Carbon steel or stainless steel |
Removable tube bundle for heat exchange within the vessel. |
| Trays / Internals |
Carbon steel or stainless steel |
For distillation, absorption, or separation processes. |
Technical Highlights of Our Pressure Vessel
- ASME U-Stamp certified: Full compliance with ASME Section VIII, Division 1 – ensuring global acceptance for safety and regulatory requirements.
- Custom engineering: Designed to your specific pressure, temperature, volume, and service conditions – with stress analysis for complex geometries.
- Material flexibility: Carbon steel (SA516 Gr.70), stainless steel (304/316L), chrome-moly (F11/F22), clad plate – selected based on service fluid and environment.
- NDE (Non-Destructive Examination): 100% RT on critical seams; UT, MT, PT as required by ASME code – ensuring weld integrity.
- PWHT (Post-Weld Heat Treatment): Applied where required to relieve residual stresses and prevent cracking.
- Hydrostatic testing: Every vessel is pressure-tested before shipment – documented with test reports.
Knowledge Module: Key Manufacturing Processes for Pressure Vessels
| Process |
Description |
Importance |
| Plate Forming |
Rolling shell plates to cylindrical shape; forming heads |
Ensures proper geometry for pressure containment |
| Welding |
SAW, GTAW, SMAW – depending on thickness and material |
Critical for joint integrity; requires qualified welders |
| NDE (RT, UT, MT, PT) |
Radiography, ultrasonic, magnetic particle, penetrant |
Detects weld defects; ensures code compliance |
| PWHT |
Stress relief in furnace or local heating |
Prevents hydrogen cracking; relieves residual stress |
| Hydrostatic Test |
Filling with water; pressurizing to 1.3× design pressure |
Verifies integrity of the complete vessel |
| Surface Preparation |
Sandblasting, painting, or coating |
Protects against external corrosion |
Knowledge Module: Pressure Vessel Design Considerations
| Parameter |
Consideration |
Impact |
| Design pressure |
Based on worst-case operating conditions |
Determines wall thickness and material selection |
| Design temperature |
Maximum/minimum expected service temperature |
Affects material selection and PWHT requirements |
| Corrosion allowance |
Additional thickness for material loss over service life |
Extends vessel life; typically 1.5-6mm |
| Weld joint efficiency |
Depends on RT requirements (full or spot) |
Affects allowable stress and wall thickness |
| Wind & seismic loads |
Based on site location |
Determines support design and anchorage |
| Lifting & transport |
Weight and dimensions |
Requires lifting lugs and transport planning |
Advantages of Ordering Pressure Vessels from Yuhong Group
- ASME U-Stamp certification: Full code compliance – accepted worldwide for regulatory and insurance purposes.
- Complete design & fabrication: From process design to final delivery – all in-house, ensuring quality control and schedule management.
- Material verification: PMI (Positive Material Identification) on all pressure-retaining components.
- NDE & documentation: Complete NDE reports, hydrostatic test reports, and ASME data reports included.
- Component integration: Vessels supplied with internals – coils, trays, baffles – and external accessories such as finned tube bundles.
Component-Only Supply – We Also Provide for Maintenance & Spares
If your existing pressure vessel needs replacement parts, we supply individual components without ordering a complete new vessel:
- Dished heads – formed to your dimensions and thickness
- Nozzles and flanges – SA105, SA182 – any facing type
- Internal coils – carbon steel or stainless steel – for heating/cooling
- Manway covers and gaskets – complete access closure assemblies
- Supports – legs, skirts, saddles – fabricated to your drawing
- Heat exchanger tubes – cut to length, end-prepared
- Finned tube bundles – for external heating/cooling applications
Typical Applications for Pressure Vessels
| Industry |
Application |
Vessel Type |
| Petrochemical / Refining |
Separators, distillation columns, reactors |
Vertical columns, horizontal separators |
| Chemical processing |
Reactors, storage tanks, knock-out drums |
Vertical or horizontal, with/without agitation |
| Power generation |
Deaerators, feedwater heaters, condensate tanks |
Carbon steel, ASME code |
| Oil & gas |
Separators, scrubbers, slug catchers |
Horizontal or vertical – high pressure |
| Pharmaceutical |
Reactors, buffer tanks, storage vessels |
Stainless steel, polished internal finish |
| Food & beverage |
Mixing tanks, storage vessels |
Stainless steel, sanitary construction |
Knowledge Module: Common Pressure Vessel Failure Modes & Prevention
| Failure Mode |
Cause |
Prevention |
| Corrosion |
Process fluid attack, external environment |
Proper material selection; corrosion allowance; coatings |
| Cracking (HIC / SCC) |
Hydrogen, chlorides, stress |
PWHT; proper material selection; hardness control |
| Fatigue |
Cyclic pressure/temperature |
Design for fatigue life; NDE monitoring |
| Brittle fracture |
Low temperature, thick section |
Impact testing; material toughness requirements |
| Erosion |
High-velocity fluids, particulates |
Inlet baffles; erosion-resistant materials |
Quality Assurance & Documentation
Every pressure vessel we fabricate includes:
- ASME U-Stamp certification – with Manufacturer’s Data Report
- Material Test Certificates (MTC) per EN 10204 3.1
- NDE reports – RT, UT, MT, PT as required
- PWHT records – time-temperature charts
- Hydrostatic test report – documented and witnessed
- PMI (Positive Material Identification) – 100% verification
- Third-party inspection (SGS, BV, TÜV) – at buyer’s request
Get a Quotation for Your Pressure Vessel
To quote a custom pressure vessel like the one in your photographs, send the following to jimmy@steelseamlesspipe.com:
- Vessel type (vertical/horizontal, separator, storage, reactor)
- Design conditions (pressure, temperature, volume)
- Service fluid (corrosivity, fouling tendency)
- Required material (carbon steel, stainless steel, clad, alloy)
- Special features (coils, trays, agitation, insulation)
- Any drawing or sketch available
We will respond with a technical proposal, general arrangement drawing, and competitive price – typically within 72 hours.
