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Allowance lor insulation boxes should be made. Uso c1osures, nozzles or chambers should be designed in accordance with the rules set out in this International Standard. Such joints should incorporate lire. In all areas handling flammable fluid, such Irenches should be divided by lirebreaks into sections about 10m in length. 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.
Annexes A layout 01 piping. The 1649 any firebreak wa! Valves should be approachable Irom two sides with easy.
Flare and reliel line baltery limil valves should be installed with Iheir stems horizontal. Each member body interested in isk subject lor which a technical committee has been established has the right to be represented on that committee.
A single ladder up 10 an emergency shut-off valve is not acceptable. Sufficient clearance should be provided for satisfactory operation 01 lever valves.
BS ISO 15649:2001
Adequate allowance should be made lor siting sleam headers and Irapping slalions at the planl layoul slage. Examples 01 lines requiring complete drainage are: The 5ite owner should be required to lurnish details 01 all other actual or planned buried services izo cables and all roadways or other surface loads within the construction working width or 20ne 01 the proposed pipe.
Where an alternative is offered, the vendor should idenlify any variations from this Internalional Slandard and provide delails.
This may often be achieved by substituting the set The informalion in Ihis annex A supports Ihe requiremenls 01 4.
ISO 石油及天然气工业-管路 – MBA智库文档
Additiona1 earth cover 51649. Adequale means should be provided lor removing Ihe test waler from the pipe and trench. Pipe marklng and recording 8. Underground lines should be provided with a means lor emptying. AII buried pipe5 should be identilied on as.
PD CEN/TR 14549:2004
Valves in ground-Ievel pipe tracks should be suitably grouped. Tankage areas Additional considerations A. The bore of the piping should be clean 10 the required standard belore laying in Ihe trench. Typical slopes lor sloped lines are as lollows: These should also be employed for sections inslalled by thrusl boring or similar means. Methods 01 protection may include: Piping not protected by a pressure.
Where valves are secured in position by clamping between pipe lIanges, the effect 01 removing the izo pipe should be laken inlo account. Lines passing through bunds should be protected to minimize corrosion A.
InstalJation in trenches 8. Dynamic amplification may be ignored.
The Inlormation in this annex supports Ihe requiremenls 01 4. For undated relerences, Ihe latest edition 01 the normative documenl relerred to appJies.
Attention should be given 10 pipe movement caused by Ihermal changes, A. Depth of installatlon 8. Wire ropes and chains should not be used for lifting. Pipes entering or 1eaving pipe racks should do so at common intermediate elevations, either above or below the main rack levels A. Draining and venting 4. Pipes in sleeves should be sealed to the sleeve where A. Pipe lracks should nol encircle equipment. Consideration should be given as to whether glass-reinlorced-plastics piping in accordance with should be specilied.
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 156499 with drainage points. 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.
Fabrication, installation and operation.
This may not be easy to demonstrate il ixo standards are selected from a variety 01 origins. The owner shall establish Ihe requirements lor design, con. Protective pipe coatings should be examined after the pipe is laid and prior to back-filling the excavation. The piping manufacturer shall! The work 01 preparing International Standards is normally carried out through ISO technical committees.