JIS B 8270:1993

1 Scope 1.1 Applicable pressure vessels 1.2 Application of individual standards related to pressure vessels 1.3 Range to be pressure vessels2 Definitions3 Classification of grades of pressure vessels4 Clarification of applicable conditions to this Standard and quality guarantee 4.1 Order specifications and quality control requirements of user of pressure vessels 4.2 Design documents of manufacturer of pressure vessels 4.3 Inside quality control of manufacturer of pressure vessels 4.4 Quality guarantee and manufacturing report of manufacturer of pressure vessels5 Materials 5.1 Materials in general 5.2 Materials to be used for pressure vessels of respective grades 5.3 Iron and steel materials 5.4 Nonferrous metal materials 5.5 Casting quality coefficient 5.6 Bolt, nuts and washers 5.7 Welding pipe fittings6 Design 6.1 Design in general 6.2 Permissible limit of permissible stress or primary stress of material to be used in design 6.3 Various characteristics of material to be used for design 6.4 Stress analysis and fatigue analysis 6.5 Shells and heads 6.6 Cover plates 6.7 Bolted flanges 6.8 Rapid opening and closing apparatus of cover 6.9 Holes 6.10 Tube sheets 6.11 Flat heads supported by stays 6.12 Expansion joints 6.13 Jackets 6.14 Non-circular shells 6.15 Attachments and supporting structures 6.16 Saddle supported horizontal pressure vessels7 Welded joint design 7.1 Welded joints in general 7.2 Welded joint quality factors 7.3 Working ranges of types of welded joints according to respective special uses of pressure vessels and nondestructive testings thereof 7.4 Working ranges of types of welded joints of pressure vessels manufactured by high tensile heat treated steel and nondestructive test 7.5 Special prescriptions for the pressure vessels manufactured by nonferrous metallic materials 7.6 Details of welded joints in general 7.7 Types of welded joints to be used in classification A 7.8 Types and details of welded joints to be used in classification B 7.9 Types of welded joints to be used in classification C and details thereof 7.10 Attaching welding at the holes of classification D 7.11 Plug weldings 7.12 Fillet weldings 7.13 Attaching by welding of stays8 Working in general 8.1 Confirmation of materials 8.2 Repair of material defects 8.3 Inspection before working of material 8.4 Cutting of material and finishing of cut surface 8.5 Test and inspection of cut faces 8.6 Forming of shells and heads 8.7 Working of holes for threaded stays 8.8 Circularity of shells 8.9 Manufacturing tolerances of formed heads 8.10 Special prescriptions on the working of high tensile heat treated steels 8.11 Special prescriptions on the working of stainless clad steels9 Welding procedures 9.1 Welding procedures in general 9.2 Nondestructive tests of welded joints 9.3 Repair of defects of welds 9.4 Special prescriptions for corrosion resistant clads, corrosion resistant clad weldings or corrosion resistant linings 9.5 Special prescriptions for welding of tube plates and heating tubes10 Heat treatments 10.1 Post weld heat treatments 10.2 Heat treatment of pressure vessels to be manufactured using high tensile heat treated steels 10.3 Heat treatment of forged pressure vessels 10.4 Post weld heat treatment of pressure vessels to be manufactured using nonferrous metallic materials 10.5 Post weld heat treatment of pressure vessels to be manufactured using stainless clad steel11 Test and inspection 11.1 Test and inspection in general 11.2 Mechanical tests of welded joints 11.3 Methods of nondestructive tests and judgements of results 11.4 Nondestructive test engineers 11.5 Retests of nondestructive tests 11.6 Pressure test 11.7 Leakage test 11.8 License hydraulic test12 Accessories 12.1 Overpressure preventing safety devices 12.2 Pressure gauges 12.3 Thermometers 12.4 Liquid level meters13 Markings

Standard applies to the attachments, construction and accessories (1) of the stationary type pressure vessels which are the vessels retaining the pressure exceeding atmospheric pressure, vessels containing fluid which generates pressure, or the vessels subjected to the external pressure. However, the following pressure vessels are not included: (1) Those which are covered in the scopes of other Japanese Industrial Standards (2). (2) Those which are made of non-metallic materials. (3) Those which are related to nuclear energy. (4) Those which are of riveted construction and of brazed construction. (5) Those which are subjected to direct fire. (6) Those which are of special construction (3) or of special uses (4).

93 [15/03/1993]