1.0.1 This standard is applicable to the general structure in the design of steel chemical vessels.
1.0.2 This standard is not applicable to the special structures or particular structures specified in the special vessel standards.
2 Normative References
The following documents are essential for the application of this standard. For dated references, only the dated editions apply to this standard. For undated references, the latest edition of the normative document (include all the amendments) is applicable to this standard.
Rolling Stock Gauge for Standard Gauge Railways GB 146.1-1983
Structure gauge for standard gauge railway GB 146.2-1983
Steel pressure vessels GB 150
Tubular heat exchangersGB 151
Weld symbolic representation on drawings GB/T 324-2008
Recommended Joint Preparation for Gas Welding Manual Metal Arc Welding Gas-shield Arc Welding and Beam Welding GB/T 985.1-2008
Recommended Joint Preparation for Submerged Arc Welding GB/T 985.2-2008
Welding and Allied Processes-Nomenclature of Processes and Reference Numbers GB/T 5185-2005
Nominal diameter of pressure vessels GB/T 9019-2001
Technical Drawings-Dimensions, Proportions and Simplified Representation for Welding Symbols GB/T 12212-1990
Steel Spherical Tanks GB 12337
Heads for pressure vessels GB/T 25198-2010
Steel pipe flanges, gaskets and bolting (PN Designated) HG/T 20592~20614-2009
Steel pipe flanges, gaskets and bolting (Class Designated) HG/T 20615~20635-2009
Toxicity hazard and explosive risk degree classification for chemical medium in the pressure vessels HG 20660-2000
Assemble type sight glass HG/T 2150-1992
Steel man hole and hand hole HG/T 21514~21535-2005
Antifrost liquid level gauge HG/T 21550-1993
Chemical equipment lifting lugs and engineering technical specificationHG/T 21574-2008
Magnetic level gauge HG/T 21584-1995
Light type glass board level gauge HG/T 21589-1995
Supervision regulation on safety technology for stationary pressure vessel TSG R0004-2009
3 Terms and Definitions
For the purposes of this standard, the following terms and definitions apply.The terms and definitions listed in "Specification of Design Base for Steel Chemical Vessels"HG/T 20580 are not repeated here.
3.0.1 Pressure
Unless otherwise provided, pressure refers to the gauge pressure.
3.0.2 Nominal pressure
Nominal pressure refers to the standard design pressure grade classified customarily for standard or series spare parts.
3.0.3 Nominal size
Nominal size is a group of data agreed uniformly in the element design and application for the convenience of mutual matching and exchanging between parts. Nominal size is a symbolic basic size of vessel parts.
3.0.4 Raised face
Raised face refers to a type of flange sealing surface. The raised smooth seal face and the contact surface with gasket are located on the inner side of bolt hole, the code number is RF. It is also known as plane sealing.
3.0.5 Full face
Full face refers to a type of flange sealing surface, also called full plane. The full face and the contact surface with gasket are located on the inner and outer side of bolt hole, the code number is FF. It is also known as broad face sealing.
3.0.6 Welding
A way to joint workpieces or parts through heating or pressurizing by using or without using filler materials.
3.0.7 Welding structure
The connection structures fabricated by using welding method are called weld structures. The structures formed by welding vessels parts are also belong to weld structures.
3.0.8 Weld
Weld refers to the joint part formed after welding workpieces or parts. The type of weld may approximately be classified into: butt weld, fillet weld, plug weld, slotted weld and edge weld.
3.0.9 Weld reinforcement
The maximum height of the metal in the butt weld section over the surface connecting line of base metal.
3.0.10 Weld convexity
Weld convexity refers to the maximum distance between weld toe connecting line and weld surface in the transverse plane of convex fillet weld.
Foreword 1 Scope 2 Normative References 3 Terms and Definitions 4 Nomenclature 5 General 6 Cylinder, Closures and Their Connection 7 Flanges, Gaskets, Bolts and Nuts 8 Man Hole, Hand Hole and Inspecting Hole 9 Openings, Reinforcement and Nozzles 10 Liquid Level Meter, Sight Glass, Temperature Meter and Pressure Meter 11 Presure Relief Devices 12 Supports 13 Baffles at Inlet and Outlet 14 Hosting Lugs and Pillars 15 Lighting Rod and Grounding Plate 16 Welding Pads, Insulation Tacks and Insulation Rings 17 Sizes of Outside Profile and Limitations of Transportation 18 Weld Structure Annex A (Informative annex) Gaskets Used in Petrochemical Vessel Flanges Annex B (Informative annex) Gaskets Used in Pipe Flanges in Petrochemical Vessels Annex C (Informative annex) Anticorrosion Properties of Metal and Nonmetallic Gaskets Annex D (Informative annex) Physical Properties of Metallic Gaskets
