Pressure Vessel Steel Plates Standard
Date:2026-09-14View:2Tags:SSAW steel pipe,LSAW steel pipe,Epoxy pipe
Pressure vessel steel plates—often referred to as "boiler and vessel plates"—are steel plates specifically manufactured for the construction of steam boilers, pressure vessels, and structural components of other pressure-bearing equipment.
1. US Standard System: ASME and ASTM
These are the most widely used standards globally for petrochemical, oil refining, and large-scale pressure vessel projects; the core standard is the ASME BPVC (Boiler and Pressure Vessel Code).
Common Grades:
Carbon steel for moderate and low-temperature service: SA-516 Gr.70 is the absolute "workhorse"; suitable for moderate to low-temperature environments, it is the preferred choice for many export projects.
Carbon steel for high-temperature service: SA-515 is used for moderate to high-temperature applications.
High-strength carbon-manganese-silicon steel: SA-537 (Class 1/2) is used where higher strength is required.
Chromium-molybdenum alloy steel: SA-387 (e.g., Gr.11, 22, 91) is used for high-temperature, high-pressure, and hydrogen-service environments.
Low-temperature nickel steel: SA-203 (e.g., Gr.E) is used for low-temperature operating conditions.
Characteristics: The ASME code specifies not only material properties but also mandates associated rules for design, fabrication, and inspection. If a project requires the ASME "U" stamp, ASME-approved materials must be used.
2. European Standard System: EN 10028 Series
This is the mandatory standard for Europe and many international EPC projects; it is closely linked to the EU's PED (Pressure Equipment Directive) and is crucial for obtaining CE certification.
Standard Structure: EN 10028 is a series of standards categorized by material type:
EN 10028-1: General requirements.
EN 10028-2: Non-alloy and alloy steels with specified elevated temperature properties (e.g., P265GH, P355GH, 16Mo3, 13CrMo4-5).
EN 10028-3: Weldable fine-grain steels, normalized (e.g., P355NL1, P355NL2; commonly used for low-temperature applications).
EN 10028-4: Nickel alloy steels for low-temperature service. EN 10028-5: Thermomechanically rolled (TMCP) fine-grain steels; not suitable for hot forming.
EN 10028-6: Quenched and tempered fine-grain steels; intended for high-strength applications.
Common grade: P355GH is the most common non-alloy steel for boilers and pressure vessels; its properties are comparable to the Chinese standard Q345R and the American standard SA-516 Gr.70.
3. Japanese Standard System: JIS
Japanese Industrial Standards (JIS) are widely used in Asia and in certain marine projects; specifications from ClassNK (Nippon Kaiji Kyokai) frequently reference JIS standards directly.
Core standards:
JIS G 3103: Carbon and molybdenum steel plates for boilers and pressure vessels; grade designations carry the prefix "SB" (e.g., SB410, SB450).
JIS G 3115: Steel plates for pressure vessels for intermediate temperature service; grade designations carry the prefix "SPV" (e.g., SPV235, SPV355).
