SY/T 4130-2024 Code for construction of glass fiber reinforced thermosettingresin on-site winding vertical storage tanks English, Anglais, Englisch, Inglés, えいご
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ICS
E
Professional standard of the People's Republic of China
SY/T 4130-2024
Replaces SY/T 4130-2016
Code for construction of glass fiber reinforced thermosetting resin on-site winding vertical storage tanks
玻璃纤维增强热固性树脂现场缠绕立式储罐施工规范
(English Translation)
Issue date: 2024-12-25 Implementation date: 2025-06-25
Issued by National Development and Reform Commission, P.R.C
Contents
1 General provisions
2 Basic requirements
3 Preparation for construction
4 Acceptance and storage of materials
5 Tank roof construction
5.1 General requirement
5.2 Tank roof production
6 Tank shell construction
6.1 General requirement
6.2 Tank shell mold installation
6.3 Tank shell overall roduction
6.4 Tank shell segments production
7 Tank bottom construction
7.1 Foundation inspection
7.2 Tank bottom production
8 Storage tank assembly and installation
8.1 General requirement
8.2 Tank topand tank shell pair
8.3 Shell segments assembly
8.4 Bottom-to-shell assembly
8.5 Hoisting accessory
9 FRP flange nozzle, pipe and accessories installation
9.1 FRP flange nozzle installation
9.2 FRP pipe installation in tank
9.3 FRP special-shaped components installation in tank
9.4 Spiral staircase, platform, handrail installation
9.5 Other accessories installation
10 Inspection and testing
10.1 Appearance inspection
10.2 Geometry and dimension inspection
10.3 Mechanical properties checking
10.4 Hydro-test
11 Health, safety and environment protection
12 Project completion
Appendix A Quality inspecting instruments of FRP storage tanks construction
Appendix B Technological process of FRP storage tanks construction
Explanation of wording in this code
List of quoted standards
Addition: Explanation of provisions
1 General Provisions
1.0.1 This code is formulated to standardize the construction technology for on-site filament-wound vertical storage tanks made of glass fiber reinforced thermosetting resin (FRP storage tanks), to ensure project quality, and to meet the requirements of safety, reliability, technical applicability, and economic rationality.
1.0.2 This code applies to the construction of on-site filament-wound vertical cylindrical FRP storage tanks with a diameter not greater than 30 m and a volume not greater than 10,000 m³.
1.0.3 In addition to complying with this code, the construction of FRP storage tanks shall also comply with current relevant national standards.
2 Basic Requirements
2.0.1 The construction unit shall establish and maintain a sound quality management system and ensure its effective operation.
2.0.2 The construction unit shall be equipped with measuring instruments meeting the construction needs. Measuring instruments shall be verified or calibrated and used within their validity period.
2.0.3 When the storage tank has anti-static performance requirements, anti-static materials may be used. The internal surface resistivity in contact with the medium shall not be greater than 1.0×10⁶ Ω·m, or the volume resistivity shall not be greater than 1.0×10⁶ Ω·m. Other anti-static methods may also be used.
2.0.4 When the storage tank has flame retardant performance requirements, the external protective layer shall use flame-retardant resin or contain added flame retardants.
2.0.5 Storage tank construction shall be carried out according to a construction organization design or special construction plan prepared based on design document requirements, and shall include a process qualification test report.
2.0.6 The tank roof and tank wall shall consist of an inner liner layer, a structural layer, and an external protective layer. The tank bottom shall consist of an inner liner layer and a structural layer. Their thicknesses shall meet the requirements of the design documents.
2.0.7 To prevent UV aging or meet other performance requirements, the external surface of the tank wall shall have a resin-rich layer with a thickness not less than 0.25 mm.
2.0.8 Before bonding on the external surface of the FRP storage tank, the bonding area shall be ground. The grinding depth shall reach the structural layer. Before bonding metal components, the base plate of the metal component connecting to the FRP surface shall be derusted. The derusting grade shall comply with St3 grade specified in the current national standard "Preparation of steel substrates before application of paints and related products — Visual assessment of surface cleanliness — Part 1: Rust grades and preparation grades of uncoated steel substrates and of steel substrates after overall removal of previous coatings" GB/T 8923.1.
3 Construction Preparation
3.0.1 Before the construction of FRP storage tanks, the tank foundation shall be inspected and accepted.
3.0.2 The construction environment temperature for FRP storage tanks should be 10°C to 35°C. When the ambient temperature is below 10°C, measures such as heating may be taken to promote curing. Open flames shall not be used for heating.
3.0.3 Construction of storage tanks shall not be carried out during rain or snow, when the ambient humidity exceeds 80%, or when the wind speed reaches 10.7 m/s or higher without effective protective measures.
3.0.4 Technical preparations for FRP storage tank construction shall include the following:
1 Familiarization with construction drawing design documents, understanding the key points and difficulties of the project;
2 Joint review of drawings, design disclosure, and technical disclosure work;
3 Preparation and review of construction organization design or construction plan, as well as quality, health, safety, and environmental measures.
3.0.5 On-site construction preparations for FRP storage tank construction shall include the following:
1 Handling construction procedures;
2 Completing construction water, electricity, access roads, communication, site leveling, and temporary facility work;
3 Determining the transportation plan;
4 Understanding the relationship between the construction site and adjacent projects, buildings (structures), underground installations, and farmland water conservancy;
5 Investigating available conditions for power, power supply, communication, fire protection, labor, living supplies, and medical and health services;
6 Investigating the impact of construction on the natural environment and living environment, and the measures to be taken;
7 Before project construction, hazard identification and assessment shall be carried out, and emergency plans and monitoring measures shall be formulated for major hazards.
3.0.6 Equipment and tool preparations for FRP storage tank construction shall include the following:
1 Completing the commissioning of construction equipment;
2 Completing the fabrication and assembly of molds.
3.0.7 Material preparations for FRP storage tank construction shall include the following:
1 The storage quantity of main materials shall meet the requirements for continuous operation;
2 Proper handling of material procurement, inspection, transportation, and storage.
3.0.8 Before filament winding of FRP storage tanks, a resin gelation test shall be conducted based on on-site environmental temperature, humidity, construction time, and other conditions to determine the mix ratio of curing agent and accelerator for production.
4 Material Inspection, Acceptance, and Storage
4.0.1 Engineering materials shall comply with design document requirements and shall have qualified quality certification documents. If there is doubt about the material quality, re-inspection shall be carried out according to the provisions of current relevant national standards.
4.0.2 Raw materials for FRP storage tank construction shall comply with the following provisions:
1 Glass fiber roving shall comply with the provisions of the current national standard "Glass fiber roving" GB/T 18369; glass fiber woven roving shall comply with the provisions of the current national standard "Glass fibre woven roving" GB/T 18370; glass fiber chopped strand mat shall comply with the provisions of the current national standard "Glass fibre mats (chopped strand and continuous filament)" GB/T 17470; glass fiber stitched fabrics shall comply with the provisions of the current national standard "Glass fibre stitched fabrics" GB/T 25040.
2 Glass fiber surface mat shall comply with the provisions of the current national standard "Glass fibre wet web" GB/T 26733; the main performance indicators of synthetic fiber surface mat shall comply with the provisions of Table 4.0.2.
3 Unsaturated polyester resin shall comply with the provisions of the current national standard "Liquid unsaturated polyester resin for fiber reinforced plastics" GB/T 8237; vinyl ester resin shall comply with the provisions of the current national standard "Technical code for anticorrosion engineering of vinyl ester resins" GB/T 50590; other resins shall comply with the provisions of current relevant national standards.
4 FRP pipes and fittings shall comply with the provisions of the current national standards "Low-pressure fiberglass line pipe and fittings" SY/T 6266 or "High-pressure fiberglass line pipe" SY/T 6267.
4.0.3 The use of raw materials for FRP storage tanks shall comply with the following provisions:
1 During contact molding ply lay-up construction, fiber materials shall be impregnated with resin solution and air bubbles shall be removed;
2 The overlap width of chopped strand mat and stitched fabrics should not be less than 20 mm; the overlap width of glass fiber surface mat and synthetic fiber surface mat shall not be less than 10 mm. After every 6 mm thickness of ply lay-up construction, overlap joints shall be staggered. The staggered distance shall be greater than or equal to 200 mm;
3 When the fiber ply orientation is crossed, the crossing angle should be greater than 10°;
4 The resin solution prepared on-site should be used within 2 hours;
5 Raw materials cut for use on-site should be used within the same day.
4.0.4 The storage of materials shall comply with the following provisions:
1 Construction materials shall be stored separately in a cool, dry place, away from ignition sources. Material stacks shall be marked with clear identification and safety warning signs.
2 Accepted FRP pipes shall be stacked in layers according to specifications and direction, and stacked separately. The stacking height shall ensure the pipes do not become unstable or deform, and shall not exceed 2 m. Soft materials shall be placed under the bottom layer of pipes, and anti-slip wedges shall be added. The bottom elevation should be greater than or equal to 200 mm.
