DANSK DS/EN 10311/ZA PDF

This European Standard specifies a range of jointing methods for connecting steel tubes and steel tubes and fittings for use with aqueous liquids, including water for human consumption.
The following specific joint types are covered by this European standard: butt welded joints, welded spigot and socket (or sleeve joints), welding collars, flange joints, threaded joints, spigot and socket joints with seal and mechanical couplings.
This European Standard specifies requirements for the strength and integrity of the joints and the testing of the joints.
This European Standard does not specify the requirements for the tubes or the fittings.
This European Standard is not intended for use in heating networks where elevated temperature properties are required
Flexible joints which permit significant angular deflection, both during and after installation and which can accept slight offset of the centre line, are not covered by this standard.
NOTE Other types of joint may be used, in which case the joint details and the requirements should be agreed between the manufacturer and the purchaser at the time of enquiry and order.