SH/T 3522-2003 Construction Standard for Heat Insulation Work in Petrochemical Industry
石油化工隔熱工程施工工藝標準
1 Scope
1.1 This standard specifies construction methods and quality requirements for the heat insulation work. It is applicable to construction of external heat insulation work for the equipment and piping constructed in the petrochemical engineering; the construction of heat insulation work for production device service may refer to this standard for implementation.
1.2 This standard is not applicable to construction of heat insulation work for long-distance buried piping in petrochemical industry.
2 Normative References
The provisions in the following documents, through reference in this standard, constitute the provisions of this standard. For dated references, subsequent amendments to (excluding correction to), or revisions of, any of these publications do not apply. However, all parties to coming to an agreement according to this standard are encouraged to study whether the latest edition of these documents applies. For undated references, the latest edition applies.
GB/T 912 Hot-rolled Sheets and Strips of Carbon Structural Steels and High Strength Low Alloy Structural Steels
GB/T 2518 Continual Hot-dip Zinc-coated Steel Sheets and Strips
GB 3280 Cold Rolled Stainless Steel Plate Sheet and Strip
SH 3010 Specification for the Insulation of Equipment and Pipe for Petrochemical Industry
SH 3022 Technical Specification for the Coating Anticorrosion of Equipment and Piping in Petrochemical Industry
SH 3503-2001 Regulation of Technical Document for Construction Completion of Petrochemical Industry Project
SH 3505 Technical Code for Construction Safety in Petrochemical Engineering
YB 605 Aluminum and Aluminum Alloy Plate
3 General
3.1 Typical heat insulation structures adopted for the heat insulation construction of equipment and piping are as follows:
a) Thermal insulation structure; it may be constituted of heat insulation layer and protective layer or heat insulation layer, moisture-proof layer and protective layer, see Figures 1a) and b);
b) Cold insulation structure; it is constituted of the heat insulation layer, moisture-proof layer and protective layer, see Figure 1c) .
1 – thermal insulation material; 2 – thermal insulation layer joint; 3 - galvanized steel strip or galvanized steel wire; 4 - metal protective layer; 5 - protective layer joint; 6 - tapping screw or rivet
a) Thermal Insulation Structure
1 – thermal insulation material; 2 – thermal insulation layer joint; 3 - galvanized steel strip or galvanized steel wire; 4 - moisture-proof layer; 5 - metal protective layer; 6 - protective layer joint; 7 - tapping screw or rivet.
b) Thermal Insulation Structure with Moisture-proof Layer
1 - cold insulation material; 2 - cold insulation layer joint; 3 - stainless steel strip or stainless steel wire; 4 - moisture-proof layer; 5 - metal protective layer; 6 - protective layer joint; 7 - tapping screw or rivet
c) Cold Insulation Structure
Figure 1 Heat Insulation Structure
3.2 Heat insulation structure form of the equipment and piping shall meet the following requirements:
a) Fixed structure shall be adopted for the equipment cylinder and straight section of piping;
b) During the heat insulation construction of flange, valve and manhole at the part where is frequently disassembled, removable metal heat insulation box structure should be made into (See Figures 48, 49 and 50);
c) Expansion joint shall be reserved for the heat insulation layer of hard materials and its structure is shown in Figure 2.
a) Structure of Expansion Joint for Single-layer Heat Insulation
b) Structure of Expansion Joint for Double-layer Heat Insulation
c) Structure of Expansion Joint for Multi-layer Heat Insulation of Re-insulation
1 - protective layer; 2 - soft filling material; 3 - hard heat insulation product
Figure 2 Structure of Expansion Joint
3.3 The Supplier of insulation materials heat insulation materials or products shall guarantee the quality of materials and provide document and information, including product quality certificates and product instructions.
3.4 Construction of heat insulation work shall be in accordance with the requirements of the design document and this standard; and its quality shall meet the requirements of SH 3010.
3.5 Construction of heat insulation work should be carried out according to construction procedures described in Figure 3.
Construction preparation Material inspection Installation of support member and fastener for heat insulation De-rusting and anti-corrosion construction
Concealed inspection
Concealed inspection
Construction of heat insulation layer Construction of moisture-proof layer Construction of external protective layer Hand-over acceptance
Figure 3 Construction Procedures for Heat Insulation Work
3.6 Acceptance of concealed work shall be carried out for the post-procedure part during the construction of heat insulation work.
3.7 De-rusting and anti-corrosion construction of heat insulation work shall be in accordance with the requirements of SH 3022.
Foreword I
1 Scope
2 Normative References
3 General
4 Materials
4.1 General Requirements
4.2 Acceptance and Preservation
5 Construction Preparation
5.1 Technical Construction Preparation
5.2 Construction Site Preparation
6 Installation of Support Member and Fastener for Heat Insulation
6.1 General Requirements
6.2 Installation of Fasteners for Heat Insulation
6.3 Installation of Support Member for Heat Insulation
7 Construction of Heat Insulation Layer
7.1 General Requirements
7.2 Construction by Filling Method
7.3 Construction by Bundling, Patching Masonry and Winding Methods
7.4 Construction by Bonding Method
7.5 Construction by Pouring Method
7.6 Construction by Spray Method
7.7 Construction by Smear Method
8 Construction of Moisture-proof Layer
8.1 General Requirements
8.2 Cold Method
8.3 Hot Method
8.4 Winding Method
9 Construction of the Protective Layer
9.1 General Requirements
9.2 Metal Protective Layer
9.3 Prefabrication Installation for Metal Protective Layer of the Equipment
9.4 Prefabricated Installation of Metal Protective Layer on the Piping
9.5 Protective Layer of Accessories (such as Flange)
9.6 Felt, Foil and Cloth Protective Layers
9.7 Plaster Protective Layer
10 Construction of Removable Heat Insulation Structure
11 Work Acceptance
11.1 Quality Inspection
11.2 Completion Document
Appendix A (Informative) Performance Index of Common Heat Insulation Materials and Products
Appendix B (Informative) Mix Ratio of Plaster Protective Layer
Wording Explanation
