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ASME BPVC.IV-2025

2025 ASME Boiler and Pressure Vessel Code, Section IV, Rules for Construction of Heating Boilers
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ASME BPVC.IV-2025

2025 ASME Boiler and Pressure Vessel Code, Section IV, Rules for Construction of Heating Boilers

PUBLISH DATE 2025
ASME BPVC.IV-2025
The purpose of ASME BPVC.IV-2025 is to establish the mandatory rules for the safe design, fabrication, installation, and inspection of low-pressure boilers, known generally as Heating Boilers.
What It Is Used For This document, ASME Section IV, is distinct from the power boiler code (Section I) because it focuses on boilers that operate at pressures significantly lower than those in industrial power plants. These boilers are primarily used for domestic, commercial, and institutional heating applications. Its primary uses are:
  • Low-Pressure Service: It specifically governs boilers intended for operation at low pressure limits, which are:
    • Steam Heating Boilers: Not exceeding 15 psi (100 kPa) of maximum allowable working pressure.
    • Hot Water Heating/Supply Boilers: Not exceeding 160 psi (1,100 kPa) pressure and/or 250 ∘ F (121 ∘ C) temperature.
  • Types of Construction: It contains construction rules for various types of boilers, including those made of:
    • Wrought Material (Part HF).
    • Cast Iron (Part HC).
    • Potable Water Heaters (Part HLW).
  • Safety Devices: It specifies the requirements for mandatory safety devices, such as the sizing and capacity determination of safety valves and safety relief valves for low-pressure service.
  • Certification: Manufacturers complying with this section are authorized to stamp their heating boilers with the appropriate ASME Certification Mark (such as the "H" stamp), ensuring that the boiler meets the minimum safety standards for operation.
In summary, BPVC.IV is the essential technical code that ensures the safety of boilers commonly found in schools, apartment buildings, small commercial facilities, and homes by limiting their operating pressure and specifying robust construction and safety features.
SDO ASME: American Society of Mechanical Engineers
Document Number BPVC.IV
Publication Date July 1, 2025
Language en - English
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