Welded Pressure Vessel Steel Plate

Product Overview

Welded Pressure Vessel Steel Plate is a high-performance carbon steel and low alloy steel designed for the fabrication of welded pressure equipment operating under high pressure, high temperature, and low-temperature service conditions.
It is widely used in EPC engineering projects where structural safety, weld integrity, and long-term pressure stability are critical requirements for industrial operation.

Technical Specifications

Key Engineering Advantages

Optimized Weldability
Formulated for high-heat input welding processes (SAW, SMAW, GMAW, FCAW) without cold cracking.

Advanced Heat Treatment Options
Available in Normalized, Quenched & Tempered (Q&T), or TMCP states to eliminate internal residual stresses.

Severe Service Compliance
Available with HIC (Hydrogen-Induced Cracking) and SSCC (Sulfide Stress Corrosion Cracking) resistance for sour crude and gas environments.

Low-Temperature Toughness
Formulated to maintain excellent Charpy V-Notch impact energy at sub-zero temperatures (down to -46°C / -50°C).

Superior Machinability
Excellent performance during heavy rolling, plate bending, edge beveling, and CNC plasma cutting.

Engineering Applications

Oil & Gas Refinery Projects
• Hydrocracking reactor pressure vessels
• Hydrotreating unit shells
• Desulfurization equipment vessels
• Crude oil and fuel storage tanks

Petrochemical Engineering
• Chemical reactor vessels
• High-pressure process systems
• Heat exchanger shells and heads
• Gas separation vessels

Power Generation Systems
• Boiler drums for thermal power plants
• Supercritical and ultra-supercritical pressure systems
• HRSG (Heat Recovery Steam Generator) components

LNG & Cryogenic Projects
• LNG full containment storage tanks
• Cryogenic pressure vessels
• Gas liquefaction equipment structures

Industrial Fabrication Equipment
• Air receiver pressure tanks
• Hydraulic pressure vessels
• Industrial storage and process tanks

Available Steel Grades

Carbon Steel Pressure Vessel Grades
• ASTM A516 Gr.55 / Gr.60 / Gr.65 / Gr.70
• ASTM A537 Class 1 / Class 2
• ASME SA516 / SA537 equivalents

Low Alloy Pressure Vessel Steel
• ASTM A387 Gr.11 / Gr.22 (Cr-Mo steel)
• EN 10028 P235GH / P265GH / P355GH
• 16Mo3 / 15Mo3

Project Customized Grades
• Engineering-specific mechanical property adjustment
• Equivalent substitution for international standards
• Low-temperature toughness optimized grades

Chemical Composition

Mechanical Properties

Quality Assurance & Heavy Engineering Risk Control

Ultrasonic Testing (UT): Performed 100% in-house according to ASTM A435 / A577 / A578 (Level A/B/C) to eliminate internal laminations and voids.

Mechanical & Microstructure Validation: Destructive testing (Tensile, Impact, Bending) performed per production heat/batch.

Strict Dimensional Tolerances: Thickness tolerances controlled tighter than standard EN 10029 / ASTM A20 requirements.

Independent Third-Party Verification: Full access and support for SGS, Bureau Veritas (BV), TUV, or Intertek engineers for pre-shipment inspection and stamping witness.

Customization Capabilities

• Special thickness, width, and length
• Mechanical property customization
• Low-temperature impact enhancement
• Normalized / Q&T heat treatment
• Cutting, beveling, machining services

Packaging & Delivery

• Steel plates bundled with steel strips
• Waterproof plastic protection
• Edge protection for heavy plates
• Heat number marking for traceability
• Export wooden/steel packaging
• Customized project packaging available

Delivery Terms
FOB / CIF / CFR / EXW supported
Global sea freight, rail, and trucking available

Why Global Buyers Choose Youcheng

We are not a trading company - we are a direct mill supplier for industrial engineering projects.

Stable Project Supply Capability
Reliable production capacity for bulk and long-term contracts.

Competitive Factory Pricing
Direct mill supply eliminates trading layers and extra costs.

Fast Quotation Response
Technical & commercial quotation within 12 hours.

Full Traceability System
Each plate is fully traceable by heat number with complete MTC records.

EPC Project Experience
Widely used in pressure vessel fabrication, boiler systems, and petrochemical equipment manufacturing.

Flexible Procurement Options
Supports trial orders, bulk orders, and long-term supply agreements.

Our Certificate

Frequently Asked Questions