1 Scope
This specification specified the design and installation requirements of steam and hot water external tracing piping and steam jacket piping in petrochemical industry.
This specification is applicable to the design and installation of steam and hot water external tracing piping and steam jacket piping in petrochemical industry.
2 Normative references
The following documents are indispensable for the application of this specification. For dated references, only the edition cited applies. For undated reference, the latest edition (including any amendments) applies.
GB 50517 Code for construction quality acceptance of metallic piping in petrochemical engineering
SH/T 3041 Specification for design of piping flexibility in petrochemical industry
SH/T 3059 Specification for piping material design selection in petrochemical industry
SH/T 3546 Construction and acceptance specifications for jacket piping in petrochemical industry
3 Terms and definitions
For the purposes of this specification, the following terms and definitions apply.
3.1
tracing
indirect heating method adopted outside or inside the pipe to prevent the fluid in the pipe from condensing, generating condensate or increasing viscosity due to temperature drop, and to keep the temperature of the fluid in the pipe stable
3.2
external tracing
tracing with a tracing piping arranged outside the pipe
3.3
tracing piping
external tracing piping
3.4
jacket piping
piping composed of casing and an inner pipe
3.5
heat conduction grout
pasty substance which may be used with steam tracing piping system to improve heat transfer, with thermal conductivity and cohesiveness
3.6
thermostatic type steam trap
steam trap driven by condensate temperature change
3.7
thermodynamic type steam trap
steam trap driven by dynamic characteristics of condensate
3.8
mechanical type steam trap
steam trap driven by liquid level change of condensate
Foreword i
1 Scope
2 Normative references
3 Terms and definitions
4 Symbols
5 General requirements
5.1 Tracing range
5.2 Tracing type
5.3 Tracing media temperature
5.4 Hot water tracing and pressure
5.5 Material selection of tracing system
5.6 Insulation thickness and heat losses
5.7 Steam consumption of steam tracing and jacket piping
5.8 Total heat quantity required for jacket piping
6 Design of tracing piping
6.1 Tracing piping system
6.2 Diameter and quantity of tracing piping
6.3 Effective tracing length
6.4 Piping arrangement of tracing system
6.5 Steam manifold and condensate manifold
6.6 Hot water supply manifold and recovery manifold
6.7 Layout requirements of tracing piping
7 Design of jacket piping
7.1 Jacket piping system
7.2 Combination dimension and structure of jacket piping
7.3 Tracing length of jacket piping
7.4 Piping arrangement of jacket piping system
8 Type and selection of steam traps
8.1 Type of steam traps
8.2 Selection of steam traps
9 Installation requirements
9.1 Installation of tracing piping
9.2 Jacket piping installation
Explanation of wording in this specification
