CFS 6 Cold Finished Precision Tube for automobile and mechanical purposes

The tubes shall comply with the general requirements of BS 6323-1 and the specific requirements of this Part of the same standard, which covers tubes up to and including 230 mm outside diameter.

The tubes shall be of steel grades 3, 3A, 4, 5, 6, 7, 8, 9, 10 and 11. The grade required shall be specified in the enquiry and order, together with other details as specified in clause 5 of BS 6323-1:1982, as appropriate.

If specified in the enquiry and order, tubes having an outside diameter up to and including 50 mm and

in the annealed or normalized condition shall be subject to a leak tightness test

Leak tightness test. When a leak tightness test is required by the purchaser and specified in his

enquiry and order, each tube shall be tested by one of the following methods:

a) hydraulic leak tightness test (see 15.7 of BS 6323-1:1982).

b) eddy current test (see 15.8 of BS 6323-1:1982).

c) any other method giving an equivalent assurance of leak tightness as agreed between

the manufacturer and the purchaser. Selection of the test method shall be at the option of

the manufacturer, unless a specific test is required by the purchaser and specified on his enquiry and

order

Publications referred to

BS 970, Specification for wrought steels for mechanical and allied engineering purposes.

BS 970-1, General inspection and testing procedures and specific requirements for carbon, carbon

manganese, alloy and stainless steels.

BS 3601, Steel pipes and tubes for pressure purposes: carbon steel with specified room temperature

properties.

BS 3602, Specification for steel pipes and tubes for pressure purposes: carbon and carbon manganese steel

with specified elevated temperature properties.

BS 3603, Specification for steel pipes and tubes for pressure purposes: carbon and alloy steel with specified

low temperature properties.

BS 3604, Specification for steel pipes and tubes for pressure purposes: ferritic alloy steel with specified

elevated temperature properties.

BS 3605, Seamless and welded austenitic stainless steel pipes and tubes for pressure purposes.

BS 4360, Specification for weldable structural steels.

BS 4848, Hot-rolled structural steel sections.

BS 4848-2, Hollow sections.

BS 5135, Metal-arc welding of carbon and carbon manganese steels.

BS 6323, Specification for seamless and welded steel tubes for automobile, mechanical and general

engineering purposes.

BS 6323-1, General requirements.

ISO 4200, Plain end steel tubes, welded and seamless — General tables of dimensions and masses per unit

length.