NB/T 11917-2025 Diffusion welding heat exchanger
NB/T 11917-2025 Diffusion welding heat exchanger
Basic Information
Scope
This document is applicable to heat exchangers with a design pressure greater than or equal to 0.1 MPa and less than 100 MPa, where: a) the design pressure of titanium heat exchangers shall not exceed 35 MPa; b) the design pressure of plate-fin heat exchangers shall not exceed 15 MPa. The design temperatures applicable to this document are: a) for steel materials, the allowable operating temperature range specified in GB/T 150.2 for the materials included shall not be exceeded; b) for nickel and nickel alloys, the allowable operating temperature range specified in JB/T 4756 for the materials included shall not be exceeded; c) for titanium and titanium alloys, the allowable operating temperature range specified in NB/T 11270 for the materials included shall not be exceeded.