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Valves should be approachable Irom two sides with easy.
ISO – Petroleum and natural gas industries — Piping
Pipes in sleeves should be sealed to the sleeve where A. These should also be employed for sections inslalled by thrusl boring or similar means. Such c1osures, nozzles or chambers should be designed in accordance with the rules set out in this International Standard.
Where lines need to be drained completely, the piping should be sloped and be provided with drainage points. Attention should be given 10 pipe movement caused by Ihermal changes, A. The piping manufacturer shall!
Where an alternative is offered, the vendor should idenlify any variations from this Internalional Slandard and provide delails. Wire ropes and chains should not be used for lifting.
PD CEN/TR 14549:2004
Each member body interested in a subject lor which a technical committee has been established has the right to be represented on that committee. Depth of installatlon 8. The owner shall establish Ihe requirements lor design, con. AII buried pipe5 should be identilied on as. InstalJation in trenches 8. Additiona1 earth cover e. The 5ite owner should be required is lurnish details 01 all other actual or planned buried services including cables and all roadways or other surface loads within the construction working width or 20ne 01 the proposed pipe.
Draining and venting 4. Piping not protected by a pressure. Typical slopes lor sloped lines ieo as lollows: Consideration should be given as to whether glass-reinlorced-plastics piping in accordance with should be specilied.
Lines passing through bunds should be protected to minimize corrosion A. The informalion in Ihis annex A supports Ihe requiremenls 01 4.
The bore of the piping should be clean 10 the required standard belore laying in Ihe trench. The spaelngd any firebreak wa! Fabrication, installation and operation. Methods 01 protection may include: Tankage areas Additional considerations A.
ISO 石油及天然气工业-管路 – MBA智库文档
Care should be taken to select a method which will bond adequately with the coating 01 the main pipe body and is appropriate for the installation conditions. Annexes A layout 01 piping. Underground lines should be provided with a means lor emptying. Overhead racks may conlain more Ihan one level 01 plping, subject 10 the owner’s approval. Flare and reliel line baltery limil valves should be installed with Iheir stems horizontal.
BS ISO 15649:2001
Valves in ground-Ievel pipe tracks should be suitably grouped. This may not be easy to demonstrate il substitute standards are selected from a variety 01 origins. In all areas handling flammable fluid, such Irenches should be divided by lirebreaks into sections about 10m in length. Such joints should incorporate lire. The work 01 preparing International Standards is normally carried out through ISO technical committees. Examples 01 lines requiring complete drainage are: This may often be achieved by substituting the set Pipe lracks should nol encircle equipment.
Allowance lor insulation boxes should be made.
Adequale means should be provided lor removing Ihe test waler from the pipe and trench. Dynamic amplification may be ignored. Pipes entering or 1eaving pipe racks should do so at common intermediate elevations, either above or below the main rack levels A. Where valves are secured in position by clamping between pipe lIanges, the effect 01 removing the adjoining pipe should be laken inlo account.
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.
A single ladder up 10 an emergency shut-off valve is not acceptable.
Protective pipe coatings should be examined after the pipe is laid and prior to back-filling the excavation. For undated relerences, Ihe latest edition 01 the normative documenl relerred to appJies. Pipe marklng and recording 8.
Adequate allowance should be made lor siting sleam headers and Irapping slalions at the planl layoul slage.