ASME BPVC 2023 Section IV

PART HG
GENERAL REQUIREMENTS FOR ALL
MATERIALS OF CONSTRUCTION
ARTICLE 1
SCOPE AND SERVICE RESTRICTIONS
HG-100 SCOPE
a The rules of Part HG apply to steam heating boilers,
hot water heating boilers, hot water supply boilers, and to
appurtenances thereto. They shall be used in conjunction
with the specific requirements in Part HF boilers of
wrought materials, Part HC cast iron boilers, and
Part HA cast aluminum boilers, as applicable. The
Foreword provides the basis for these rules. Part HG is
not intended to apply to potable water heaters except
as provided for in Part HLW. Boilers with economizers
shall follow the rules of Mandatory Appendix 10.
b This Part contains mandatory requirements, specific
prohibitions, and nonmandatory guidance for materials,
designs, fabrication, examination, inspection, testing,
certification, and overpressure protection. When detailed
rules are not given in Section IV, the Manufacturer, subject
to the acceptance of the Authorized Inspector, shall
provide details of design that will be as safe as those
provided by the rules of Section IV. This may be done
by appropriate analytical methods, the appropriate use
of rules from other design Codes or, as permitted in
HG-500, by proof test.
c The Manufacturer shall establish the effective Code
edition, addenda, and cases in accordance with
Mandatory Appendix 9. Laws or regulations issued by
a municipality, state, provincial, federal, or other enforcement
or regulatory body having jurisdiction at the location
of an installation, establish the mandatory applicability of
these rules, in whole or in part.
HG-101 SERVICE RESTRICTIONS
HG-101.1 Service Restrictions. The rules of this
Section are restricted to the following services:
a steam boilers for operation at pressures not
exceeding 15 psi 100 kPa
b hot water heating boilers and hot water supply
boilers for operation at pressures not exceeding 160
psi 1 100 kPa
c hot water heating boilers and hot water supply
boilers for operation at temperatures not exceeding
250°F 120°C, at or near the boiler outlet, except that
when some of the wrought materials permitted by Part
HF are used, a lower temperature is specified
HG-101.2 Services in Excess of Those Covered by
This Section. For services exceeding the limits specified
in HG-101.1, the rules of Section I shall apply.