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BS 92 Screw threads, British Standard Whitworth and their tolerances; BS 93 Specification for British Association (B.A.) screw threads with tolerances for sizes 0 B.A. to 16 B.A. BS 94 Watertight glands for electric cables; BS 95 Tables of Corrections to Effective Diameter required to compensate Pitch and Angle Errors in Screw Threads of ...
BS 8888 is the British standard developed by the BSI Group for technical product documentation, geometric product specification, geometric tolerance specification and engineering drawings. [ 1 ] History
H7/h6 is a very common standard tolerance which gives a tight fit. The tolerances work in such a way that for a hole H7 means that the hole should be made slightly larger than the base dimension (in this case for an ISO fit 10+0.015−0, meaning that it may be up to 0.015 mm larger than the base dimension, and 0 mm smaller).
The American Petroleum Institute (API) oldest and most successful programs is in the development of API standards which started with its first standard in 1924. API maintains over 500 standards covering the oil and gas field. [2] The following is a partial list specific to welding:
BSI Group headquarters building in Gunnersbury, West London, featuring the BSI Group logo. BSI was founded as the Engineering Standards Committee in London in 1901. [5] [2] It subsequently extended its standardization work and became the British Engineering Standards Association in 1918, adopting the name British Standards Institution in 1931 after receiving a Royal Charter in 1929. [2]
Length & Width-- The length or width of a board produced as a standard size shall not be less than the specified size nor more than 6.3 mm (0.25") greater than the specified size. Squareness-- The lengths of the diagonals of a board shall not differ by more than 0.25% of the length of the diagonal. Thickness Tolerances-- Tolerances vary as follows.
The EN 10034 "Structural steel I and H sections. Tolerances on shape and dimensions" is a European Standard.The standard is developed by the technical committee ECISS/TC 103 - Structural steels other than reinforcements. [1]
British Standards (BS) are the standards produced by the BSI Group which is incorporated under a royal charter and which is formally designated as the national standards body (NSB) for the UK. [1] The BSI Group produces British Standards under the authority of the charter, which lays down as one of the BSI's objectives to: [ 2 ]