1 Scope
This specification specifies the engineering design principles and basic requirements for measuring tubing and signal transmission line of instrument in petrochemical industry.
This specification is applicable to the engineering design for instrument tubing and wiring in the constructed, extended and renovated petrochemical works of petrochemical plants and enterprises preparing fuel and chemical products with coal as raw material.
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 3836.1 Explosive atmospheres - Part 1: Equipment - General requirements
GB 3836.2 Explosive atmospheres - Part 2: Equipment protection by flameproof enclosures “d”
GB 3836.3 Explosive atmospheres - Part 3: Equipment protection by increased safety "e"
GB 3836.4 Explosive atmospheres - Part 4: Equipment protection by intrinsic safety “i”
GB 3836.15 Explosive atmospheres - Part 15: Electrical Installations design, selection and erection
SH/T 3006 Specification for design of control room in petrochemical industry
SH/T 3081 Design code for instrument grounding in petrochemical industry
SH/T 3082 Design code for instrument power supply in petrochemical industry
3 Terms and definitions
For the purposes of this specification, the following terms and definitions apply.
3.1
measuring tubing
tubes, valves and fittings that transfer the measured medium from the testing point to the instrument
3.2
instrumentation cable
generic term of instrumentation wire, cable, compensation wire, optical fiber cable and accessories
3.3
cable tray
trough-shaped product for laying and protecting wires and cables, including tray, cover plate and various components
3.4
protective piping
pipes and their connectors for laying and protecting wires and cables
3.5
micro-bend
high-frequency bending and/or local axial misalignment with amplitude of several microns in a short distance due to local lateral pressure
3.6
marco-bend
bending of optical fiber cable caused by manufacturing or installation of optical fiber cable
3.7
tensile strength members
assembly in an optical fiber cable used to limit the strain of optical fiber cable to a safe level by properly arranging a tensile strength and/or distortion-resist member
Foreword i
1 Scope
2 Normative references
3 Terms and definitions
4 Measuring tubing
4.1 Material
4.2 Tubing diameter
4.3 Laying
5 Pneumatic signal tubing
5.1 Selection
5.2 Laying
6 Cable and wire selection
6.1 Cross area
6.2 Type selection
7 Cable laying
7.1 General requirements
7.2 Cable tray laying
7.3 Protective piping laying
7.4 Cable trench laying
7.5 Directly-buried laying
8 Optical fiber cable
8.1 Selection
8.2 Laying
9 Instrument cabinet tubing and wiring
Annex A (Informative) Diameter selection of common measuring tubing
Bibliography
Explanation of wording in this specification
