Detail of HG/T 20696-1999

Introduction of HG/T 20696-1999

1.1 General The FRP chemical equipment (or glass fiber-reinforced plastic chemical equipment) mentioned in this Specification refers to the composite FRP chemical equipment with integral anti-corrosion, which adopts thermosetting resin as its matrix materials and glass fiber as its reinforcement material. 1.2 Application scope This Specification is applicable to the non-movable FRP chemical equipment with integral anti-corrosion which is manufactured by mechanical winding process. 1.3 Non-applicable scope Equipment which is heated with direct flame; Equipment for holding extremely hazardous medium; Equipment for heat conduction (e.g. jacketed reaction kettle); Special chemical equipment (e.g. tanker, electrostatic precipitators). 1.4 Design Pressure The design pressure specified in this Specification is not greater than 0.6 MPa, and the external design pressure is not greater than 0.1 MPa. The vacuum equipment shall be designed in accordance with the vessel subjected to external pressure and its design pressure is 0.1 MPa. 1.5 Design Temperature The design temperature scope specified in this Specification is generally: Universal unsaturated polyester FRP -40~+60℃ Bisphenol-A type unsaturated polyester FRP -40~+100℃ Vinyl ester unsaturated polyester FRP -40~+120℃ Epoxy FRP -40~+90℃ The anti-corrosion and thermal endurance of various types and brands of resins are different. Therefore, corresponding resin, accessory ingredient and glass fiber shall be selected and reasonable construction process shall be developed according to the types and use conditions of corrosive medium in design so as to produce anti-corrosion FRP chemical equipment. Where the anti-corrosion FRP chemical equipment is used under flammable and explosive conditions, corresponding resin formulation and process shall be selected carefully and reasonably. The small sample shall be produced to inspect the relevant indexes and formal production only starts after their qualification. 1.6 Normative References JC 277 No-Alkali and Twist-Free Glass Fiber Yarn JC 278 No-Alkali and Twist-Free Glass Fiber Yarn JC 281 No-Alkali and Twist-Free Glass Fiber Yarn JC 286 General Provisions on Coding and Naming Methods of Glass Fiber Products Gb 1446 The Generals of Test Methods for properties of Fiber-Reinforced Plastics GB 1447 Test Method for Tensile Properties of Glass Fiber-Reinforced Plastics GB 1448 Test Method for Compressive Properties ff Glass Fiber-Reinforced Plastics GB 1449 Test Method for Flexural Properties of Glass Fiber-Reinforced Plastics GB 1450.1 Test Method for Interlaminar Shear Strength of Glass Fiber-Reinforced Plastics GB 1450.2 Test Method for the Punch-Type ff Strength of Glass Fiber-Reinforced Plastics GB 1451 Test Method for the Charpy Impact Resistance of Glass Fiber-Reinforced Plastics

Contents of HG/T 20696-1999

1 General Provision 1.1 General 1.2 Application scope 1.3 Non-applicable scope 1.4 Design Pressure 1.5 Design Temperature 1.6 Normative References 1.7 Definitions 1.8 Load 1.9 Thickness 1.10 Safety Coefficient 1.11 Pressure Test 2 Materials 2.1 Requirements for Raw Materials 2.2 Glass Fiber and Fabrics 2.3 Thermosetting Resin 2.4 Commonly-Used Curing Agent for Unsaturated Polyester Resin 2.5 Mechanical properties of FRP product 3 Structure 3.1 FRP Shell Wall Structure 3.2 Support Design 3.3 FRP Tank Connection 3.4 Opening Reinforcement 3.5 Design of Reinforcing Ring 3.6 Design of Intersection Angle of Tank Bottom 3.7 Structural design of connecting pipe 3.8 Manhole Structural Design 3.9 Non-detachable Connection 3.10 Dismountable Connection 4 Calculation 4.1 Cylinder Subjected to Internal Pressure 4.2 Spherical Shell Subjected to Internal Pressure 4.3 Head Subjected to Internal Pressure 4.4 Tapered Shell Subjected to Internal Pressure 4.5 Opening Reinforcement 4.6 Design of Cylinder Subjected to External Pressure and Spherical Shell 4.7 Design of Reinforcing Ring of Cylinder Subjected to External Pressure 4.8 Design of Dished Head Subjected to External Pressure 4.9 Design of Tapered Head Subjected to External Pressure 4.10 Flange Calculation 4.11 Flat Head and Bolted Connection 4.12 Opening Calculation on Flat Head, Cap or Blank Flange 4.13 Design of Horizontal Vessel 4.14 Vertical Tank Design 5 Inspection Requirement 5.1 Appearance Requirement 5.2 Thickness Inspection 5.3 Inspection of Resin Curing Degree 5.4 Inspection of Resin Content 5.5 Inspection of Product's Mechanical Performance 5.6 Product Dimension Inspection 5.7 Full Water Test 5.8 Hydrostatic Test Appendix A Anticorrosion Properties of Anticorrosion Unsaturated Polyester Resin