.-(1) The pipeline shall be constructed of suitable steel which is safe for the conditions under which it is to be used.(2)The pipeline and its components shall be designed and constructed in accordance with a code recognised by the Chief Controller or OISD Standard-141 regarding design and construction requirements for cross country hydrocarbon pipelines and shall be capable of withstanding a pressure which shall not be less than the maximum working pressure thereof plus an allowance for surge pressure, as anticipated.(3)Provision shall be made for thermal expansion or contraction of the pipeline and for the prevention of excessive stresses on the pipeline or its anchorages, guides and connections.(4)The pipeline shall be protected by a casing of steel pipe or by increasing the thickness of its wall or in any other manner approved by the Chief Controller and any other authority having jurisdiction to prevent damage to the pipeline from usual external conditions which may be encountered in railway crossings, road crossings, river or water course crossings, bridges, long self supported spans, unstable ground, vibrations, weight of special attachments or thermal forces.(5)By-pass relief valves, pressure limiting stations or automatic shut down equipment of approved design shall be provided in the pipeline to prevent rising at any time of the pressure, in the pipeline to a pressure which exceeds the designed internal pressure by more than ten per cent.(6)Isolation valves shall be installed at each of the following locations:-(a)on the suction end and the discharge end of the pump station in a manner that permits isolation of the pump station equipment in the event of an emergency;(b)on each line entering or leaving the installation in a manner that permits isolation of the installation from other facilities;(c)on each main line at locations along the pipeline system that will minimise damage from accidental product discharge, as appropriate for the terrain in open country or for the location near cities or other populated areas;(d)on each lateral take off from a trunk line in a manner that permits shutting off the lateral without interrupting the flow in the trunk line;(e)on each side of a water crossing that is more than 30 m wide from high-water mark to high-water mark;(f)on each side of a reservoir holding water for human consumption.
