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This document specifies general tolerances for linear and angular dimensions and for shape and position of welded structures in four tolerance classes, based on customary workshop accuracy. The main criterion for selection of a particular tolerance class is based on the functional requirements which are to be met.
The applicable tolerances are always those which are stated in the drawing. Instead of specifying individual tolerances the tolerance classes according to this document can be used.
General tolerances for linear and angular dimensions and for shape and position as specified in this document apply for weldments, welding assemblies and welded structures etc.
Special provisions can be necessary for complex structures.
The specifications given in this document are based on the independency principle of ISO 8015, according to which the dimensional and geometrical tolerances apply independently of each other.
Manufacturing documentation in which linear and angular dimensions or indications for shape and position are presented without individually indicated tolerances shall be deemed incomplete if there is no, or inadequate, reference to general tolerances. This does not apply to temporary dimensions.

This document provides guidelines for periodic inspections of manual gas equipment for welding, cutting and allied processes placed downstream of the gas cylinder’s valve as shown in Figure 1 or, in the case of centralized distribution, downstream from the tapping point, since commissioning.
NOTE In some cases, gas cylinders can be replaced by cylinder bundles.
This document applies to gas welding equipment intended for professional use which utilizes compressed gases up to 300 bar (30 MPa): acetylene, liquefied petroleum gas (LPG), methylacetylene-propadiene mixtures (MPS) and carbon dioxide (CO2) and related mixtures.

This document specifies requirements for qualification testing of brazers and brazing operators for metallic materials.
This document applies to the following brazing processes in accordance with ISO 857-2 and ISO 4063 with local and global heating:
— 911 Infrared brazing
— 912 Flame brazing, torch brazing
— 913 Laser beam brazing
— 914 Electron beam brazing
— 916 Induction brazing
— 918 Resistance brazing
— 919 Diffusion brazing
— 921 Furnace brazing
— 922 Vacuum brazing
— 923 Dip-bath brazing
— 924 Salt-bath brazing
— 925 Flux bath brazing
— 926 Immersion brazing
— 972 Arc weld brazing
This document is not applicable to personnel operating brazing equipment who do not have any direct influence on the quality of the brazed joint for example, personnel performing exclusively loading/unloading the brazing unit or just initiating the brazing cycle in automatic brazing.
NOTE 1 Annex A gives guidelines on general quality requirements for brazing.
NOTE 2 This document does not apply to brazing for aerospace applications covered by ISO 11745.
The principles of this document may be applied to brazing of other materials.

This document specifies how a preliminary welding procedure specification is qualified by welding procedure tests.
This document defines the conditions for the execution of welding procedure tests and the range of qualification for welding procedures for all welding operations within the qualification of this document.
The primary purpose of welding procedure qualification is to demonstrate that the joining process proposed for construction is capable of producing joints having the required mechanical properties for the intended application.
Two classes of welding procedure tests are given in order to permit application to a wide range of welded fabrication. They are designated by classes A and B. In class A, the extent of testing is greater and the ranges of qualification are more restrictive than in class B.
Procedure tests carried out to class A automatically qualify for class B requirements, but not vice-versa. When no class is specified in a contract or application standard, all the requirements of class A apply.
NOTE Class B corresponds to Level 1 and Class A corresponds to Level 2 according ISO 15614-1.
This document applies to upset (resistance butt) welding and flash welding of any metallic materials in all product forms (e.g. with solid, tubular, flat or circular cross-section). It covers the following resistance welding processes, as defined in ISO 4063:
— 24 flash welding, using direct current or alternating current with various movement sequences, constant flashing and pulsed flashing;
— 25 resistance butt welding (upset welding), using direct current or alternating current with various current- and pressure sequences.

This document specifies the compositional ranges of a series of filler metals used for brazing. The filler metals are divided into seven classes, related to their composition, but not necessarily to the major element present.
NOTE 1 For the major element(s) present, see Annex A. In the case of composite products, such as flux-coated rods, pastes or plastics tapes, this International Standard covers only the filler metal that forms parts of such products. The melting temperatures given in the tables are only approximate, as they necessarily vary within the compositional range of the
filler metal. Therefore, they are given only for information. Technical delivery conditions are given for brazing filler metals and products containing brazing filler metals with other constituents such as flux and/or binders.
NOTE 2 For some applications, e.g. precious metal jewellery, aerospace and dental, filler metals other than those included in this International Standard are often used and these are covered by other International Standards to which reference can be made.

This document specifies requirements for resistance spot welding in the fabrication of assemblies of uncoated, and metallic coated or weldable non-metallic coated low carbon steel, comprising two or three sheets of metal, where the maximum single sheet thickness of components to be welded is within the range 0,4 mm to 3 mm.
This document is applicable to welding of sheets of the same or unequal thickness, where the thickness ratio is less than or equal to 3:1. It applies to the welding of three sheets, where the total thickness is less than or equal to 9 mm.
Welding with the following types of equipment is within the scope of this document:
a) pedestal welding equipment;
b) portable welding guns;
c) automatic welding equipment where the components are fed by robots or automatic feeding equipment;
d) multi-spot welding machine;
e) robotic welding machine.
Information on appropriate welding equipment is given in Annex A, and information on spot welding
conditions is given in Annex B. This information is provided for guidance only.
Depending on the service conditions of the fabrication, the type of welding equipment, the characteristics of the secondary circuit, electrode force actuation system,, the electrode material, and the shape, it is
possible that certain modifications are necessary. In such cases, further information can be obtained from the relevant application standard, where one exists.