GB/T 19804-2005: Welding -- General tolerances for welded constructions -- Dimensions for lengths and angles -- Shape and position

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Scope

This Standard specifies general tolerances for linear and angular dimensions
and for shape and position of welded structures in four tolerance classes, these
being based on customary workshop accuracy. The selection of a particular
tolerance class shall meet the actual needs.
General tolerances for linear and angular dimensions and for shape and
position as specified in this Standard apply for weldments, welding assemblies
and welded structures etc.. Special provisions may be necessary for complex
structures.
The specifications given in this Standard are based on the principle of
independency as specified in GB/T 4249, 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.

Basic Data

Standard ID	GB/T 19804-2005 (GB/T19804-2005)
Description (Translated English)	Welding. General tolerances for welded constructions. Dimensions for lengths and angles. Shape and position
Sector / Industry	National Standard (Recommended)
Classification of Chinese Standard	J33
Classification of International Standard	25.160.10
Word Count Estimation	8,857
Date of Issue	2005-06-08
Date of Implementation	2005-12-01
Adopted Standard	ISO 13920-1996; IDT
Regulation (derived from)	Announcement of Newly Approved National Standards No. 9, 2005 (No. 83 overall)
Issuing agency(ies)	General Administration of Quality Supervision, Inspection and Quarantine of the People Republic of China, China National Standardization Administration Committee
Summary	This standard specifies: welded structure size (linear and angular dimensions) tolerances and geometric tolerances, This knot tolerance on four levels, applicable to common manufacturing precision. Tolerance level choose should meet the actual demand. This standard specifies General dimensional tolerances and geometric tolerances applicable to welding parts, welding assembly and welded structures. Complex structure may need to make special provisions. This standard is given these technical requirements to GB/T 4249 regulations based on the principle of independence, That is, each the size and shape, location requirements are independent -, should meet the requirements. Marked only the linear and angular dimensions or geometric description, not separately marked tolerance process documents, If there is no general tolerance should be considered incomplete reference description, except temporary dimensions.