CFS 6 cold finished seamless steel tubes
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.
