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These should also be employed for sections inslalled by thrusl boring or similar means.
The owner shall establish Ihe requirements lor design, con. This may not be easy to demonstrate il substitute standards are selected from a variety 01 origins. Flare and reliel line baltery limil valves should be installed with Iheir stems horizontal. Typical slopes lor sloped lines are as lollows: The work 01 155649 International Standards is normally carried out through ISO technical committees.
Pipes in sleeves should be sealed to the sleeve where A. InstalJation in trenches 8.
Where valves are secured in position by clamping between pipe lIanges, the effect 01 removing the adjoining pipe should be laken inlo account. For undated relerences, Ihe latest edition 01 the normative documenl relerred to appJies. The piping manufacturer shall! Pipe lracks should nol encircle equipment.
ISO – Petroleum and natural gas industries — Piping
Due care should be exercised in selecting materials in order to prevent brittle-type Iracture where necessary; where lor specific reasons brittle material has to be used. Adequate allowance should be made lor siting sleam headers and Irapping slalions at the planl layoul slage. Methods 01 protection may include: Sufficient clearance should be provided for satisfactory operation 01 lever valves.
Tankage areas Additional considerations A.
Dynamic amplification may be ignored. Draining and venting 4. Annexes A layout 01 piping.
ISO 石油及天然气工业-管路 – MBA智库文档
Adequale means should be provided lor removing Ihe test waler from the pipe and trench. Overhead racks may conlain more Ihan one level 01 plping, subject 10 the owner’s approval. Where lines need to be drained completely, the piping should be sloped and be provided with drainage points. Where an alternative is offered, the vendor should idenlify any variations from this Internalional Slandard and provide delails.
Such joints should incorporate lire.
BS ISO 15649:2001
Attention should be given 10 pipe movement caused by Ihermal changes, A. Such c1osures, nozzles or chambers should be designed in accordance with the rules set out in this International Standard. Wire ropes and chains should not be used for lifting. Examples 01 lines requiring complete drainage are: Each member body interested in a subject lor which a technical committee has been established has the right to be represented on that committee. Fabrication, installation and operation.
Lines passing through bunds should be protected io minimize corrosion A. Valves should be approachable Irom two sides with easy. Pipe marklng and recording 8. Protective pipe coatings should be examined after the pipe is laid and prior to back-filling the excavation. A single ladder up 10 an emergency shut-off valve is not acceptable. Depth of installatlon 8. Piping not protected by a pressure. The bore of the piping should be clean 10 the required standard belore laying in Ihe trench.