GB/T 151-2014

1.1 This standard specifies the general requirements for metal heat exchangers, and stipulates the requirements for the materials, design, manufacture, inspection, acceptance, and installation and use of shell-and-tube heat exchangers.
1.2 The general requirements of this standard apply to shell-and-tube heat exchangers and other structural types of heat exchangers. All contents of this standard apply to shell-and-tube heat exchangers.
1.3 The design pressure applicable to this standard is:
a) The design pressure of shell-and-tube heat exchangers shall not exceed 35 MPa;
b) The design pressure of other structural types of heat exchangers shall be determined according to the corresponding reference standards.
1.4 The design temperature applicable to this standard is:
a) Steel shall not exceed the allowable use temperature range of materials listed in GB 150.2—2011;
b) Other metal materials shall be determined according to the allowable use temperature of materials listed in the corresponding reference standards.
1.5 The nominal diameter applicable to shell-and-tube heat exchangers in this standard shall not exceed 4,000 mm, and the product of the design pressure (MPa) and the nominal diameter (mm) shall not exceed 2.7×104.
1.6 Shell-and-tube heat exchangers exceeding the scope of 1.5 may be constructed in accordance with this standard.
1.7 This standard does not apply to the following heat exchangers:
a) Heat exchangers directly heated by flames;
b) Flue-type residual (waste) heat boilers;
c) Heat exchangers in nuclear energy devices with the risk of neutron radiation damage and failure;
d) Non-metal heat exchangers;
e) Heat exchangers in the refrigeration and air conditioning industry that have national standards or industry standards separately.
1.8 Definition of heat exchangers:
a) Connection of heat exchangers with external pipes:
1) The beveled end face of