1 Scope
This specification specifies the prefabrication, installation and construction techniques, and quality requirements of jacket piping in petrochemical industry. This specification is applicable to the construction and acceptance of newly-constructed, re-constructed and extended-constructed engineering projects in petrochemical industry.
2 Normative references
The following documents contain provisions which, through reference in this text, constitute provisions of this specification. For dated reference, subsequent amendments to (excluding any corrigendum), or revisions of, any of these publications do not apply. However, parties to agreements based on this specification are encouraged to investigate the possibility of applying the most recent editions of the documents indicated below. For undated references, the latest edition of the normative document referred to applies.
GB 50316 Design code for industrial metallic piping
GB 50484 Technical code for construction safety in petrochemical engineering
JB/T 4730 Nondestructive testing of pressure equipments
SH 3501 Construction and acceptance specification for toxic and combustible steel medium piping engineering in petrochemical industry
SH/T 3503 Specification on handover technical documentation for petrochemical construction projects
SH 3518 Specification for valves inspection and management in petrochemical industry
SH/T 3543 Specification on technical documentation for construction process of petrochemical construction projects
TSG ZF 001-2006 Safety Technical Supervision Regulations for Safety Valves
3 Terms and definitions
For the purposes of this specification, the following terms and definitions apply.
3.1
jacket piping
piping composed of inner pipe and casing
3.2
location plate
stop block for maintaining the minimum distance between inner pipe and casing
3.3
end plate
steel plate for connecting the end of casing with the outside of inner tube to form a closed space
3.4
communicating pipe
pipe in the jacket piping system that communicates the partition parts such as flange, valves and end plates
3.5
full jacket
type of jacket piping with inner pipe completely surrounded by casing
3.6
semi-jacket
type of jacket piping with inner pipe weld not surrounded by casing
4 Basic requirements
4.1 See Figure 1 for the structure of jacket piping. Jacket pipings are divided into full jackets and semi-jackets, as shown in Figures 2 and 3.
Foreword i
1 Scope
2 Normative references
3 Terms and definitions
4 Basic requirements
5 Preparation for jacket piping construction
5.1 Technical preparation
5.2 Operating conditions
5.3 Material preparation
6 Prefabrication of jacket piping
6.1 General requirements
6.2 Manufacturing of inner pipe and casing
6.3 Pipe fitting and connecting pipe
6.4 Flange of jacket piping
6.5 Positioning plate
6.6 Inspection of prefabricated pieces
7 Jacket piping installation
7.1 General
7.2 Installation of inner pipe and casing
7.3 Installation of communicating pipe
8 Welding of the jacket piping
9 Test of the jacket piping
10 Purge of jacket piping system
11 Technical documents for completion
Annex A (Informative) Construction flow of the jacket piping
Explanation of wording
