Heat exchanger of multitubular silicon carbide
1 Scope
1.1 This standard specifies terms and definitions, types, main dimensions and basic parameters, raw materials, design, manufacturing, inspection and acceptance, packaging, transportation, storage, and quality documents of tubular silicon carbide heat exchangers (hereinafter referred to as "heat exchangers").
1.2 This standard is applicable to tubular heat exchangers whose nominal diameter is not greater than 900 mm and whose silicon carbide tubes are adopted as components of heat exchange.
1.3 This standard is not applicable to heat exchangers with extremely hazardous media except for sulfuric acid.
1.4 This standard is applicable to the design pressure of heat exchanger as follows:
a) For sulfuric acid, highly hazardous media, gas and liquefied gas and other media,
the working pressure at the side of medium should be less than 0.1MPa;
b) For media except for Item a), the design pressure should not be greater than 1.6MPa and the maximum working temperature of medium should be less than its normal boiling point.
1.5 This standard is applicable to the design temperature of heat exchanger as follows:
a) The shell of the heat exchanger is steel vessel, which should meet the requirements
of GB/T 150 code;
b) The shell of the heat exchanger is glass lined vessel, which should meet the
requirements of GB 25025 code;
c) The shell of the heat exchanger is fluoroplastic lined vessel, which should meet
the requirements of GB/T 35974.2 code;
d) The shell of the heat exchanger is rubber lined vessel, which should meet the
requirements of HG/T 20677 code.
2 Normative references
The following referenced documents are indispensable for the application of this document.
For dated references, only the edition cited applies. For undated references, the latest
edition of the referenced document (including any amendments) applies.
GB/T 150.1 Pressure vessels - Part 1: General requirements
GB/T 150.2 Pressure vessels - Part 2: Materials
GB/T 150.3 Pressure vessels - Part 3: Design
GB/T 150.4 Pressure vessels - Part 4: Fabrication, inspection and testing, and acceptance
GB/T 151 Heat exchangers
GB/T 3045 Conventional abrasive—Chemical analysis of silicon carbide
GB/T 10610 Geometrical product specifications(GPS) - Surface texture：Profile method – Rules and procedures for the assessment of surface texture
GB 25025 Specification of glass-lined equipment for industry
GB/T 26501 General technical specification for pressure vessels lined with fluoroplastics
GB/T 35974.2 Plastics and plastic lining pressure vessels—Part 2: Material
GB/T 35974.5 Plastics and plastic lining pressure vessels—Part 5: Fabrication, inspection
and testing for pressure vessels with plastic lining
HG/T 20592 Steel pipe flanges (PN designated)
HG/T 20677 Design code for chemical equipment with rubber lining
JB/T 4712.1 Vessel supports—Part 1: Saddle support
JB/T 4712.3 Vessel supports—Part 3: Lug support
JB/T 4711 Coating and packing for pressure vessels transport
JB/T 4732 Steel Pressure Vessels—Design by Analysis
JC/T 2212 Solid—state pressureless sintered sillicon carbide ceramic heat exchanger tubes
NB/T 47003.1 Steel welded atmospheric pressure vessels
3 Terms and definitions
For the purposes of this document, the terms and definitions given in GB/T 150.1, GB/T 151 and the following apply.
3.1 Silicon carbide
A chemical compound formed by the reaction of silicon dioxide with carbon at temperatures above 2000℃.
3.2 Free silicon
An unreacted monomer of silicon molecules present in silicon carbide.
3.3 Design temperature
Design temperature of metal parts is the same as GB/T 150.1 code, design temperature of metal lining parts, including glass lining parts, is the highest temperature that the lining layer can reach; Design temperature of tubes is the highest temperature that the wall of tubes can reach. Both design temperature and design pressure are design load conditions of heat exchanger designing.
