Minggu, 12 September 2010

CHECK LIST OF PIPING DRAWINGS

Here I got the information about the piping design check list from my friend that hope can help you, how to check the design of piping arragement that we already drawn.
The Point is all the piping drawings shall be follow the P&ID, if not it can be worst..
For the Piping Engineer can be used this check list to your drafter..

Here the List of Checking of the Piping Design Drawings :

1-The isometric matches the P&ID 100%
2-The isometric matches the workshare office layout drawing
3-Model review comments are incorporated
4-Sheet numbers for the line are not duplicated
5-All symbology, numbers and call outs are legible and accurate
6-Relief valve discharge piping to closed systems is free draining to the closed system
7-Pump suction piping is as short and direct as possible and is not pocketed
8-The Engineering data block on isometrics is filled in as required before check
9-Stress requirements are satisfied
10-Spring hangers are properly identified

11-Mark pieces will fit (not skewed or angled) into the shipping container
12-Pipe spans are within the Project guidelines

13-Trimmed elbows are identified
14-Taper-boring requirements are shown
15-Appropriate selection has been made for; support, anchor, guide, shoe, cradle, pick-up, etc.
16-Special Pipe Supports (SPS) and Miscellaneous Pipe Supports (MPS) are shown
17-Pressure test vents and drains are shown
18-Line reduction at pump suction nozzles are minimum from the pump nozzle and are eccentric
      flat side on top
19-Pump suction lines will have a strainer before the pump nozzle
20-Field welds (FW) and field fit-up welds (FFW) are shown

21-Sheet continuations are shown
22-Sentry-drilling (tell-tale hole) requirements are shown
23-Relief valves discharging to atmosphere will have weep holes in the bottom of the tailpipe -
      thermal relief valve discharge downward does not require a weep hole
24-Control valve manifolds have a valved bleed between the control valve and the upstream or
     downstream block valve - per Project requirements
25-The downstream block valve at a pressure relief valve shall have the operator orientation
      range from horizontal to down
26-There will be no branches, reductions, valves, welds or full pentration welds from external
      attachments to the pipe within the upstream or downstream run of orifice flanges or other
      instruments with similar design requirements
27-All instruments are tagged
28-All Specialty Item numbers are shown
29-Item code numbers are shown where required on the graphic portion of the isometric
30-Direction of flow is shown

31-All line sizes are shown
32-All out-of-spec items are fully identified
33-All valve handwheels/operators/actuators are shown with special orientations called out
34-Valve handwheel extensions are shown and called out
35-Chain operators and impact hammer operators are shown and called out
36-Special pipe wall thicknesses are indicated
37-All flanges 26" (non-standard) and larger have full descriptions
38-Coldspring, prespring, or any pre-positioning requirements are called out
39-Mark pieces are identified
40-The extent of insulation for personnel protection is is shown

41-Insulation breaks are shown
42-Line class breaks (spec breaks) are shown
43-Equipment nozzles are identified
44-Short radius elbows are called out
45-Insulation on piping inclined greater than piping is supported
46-Reducing elbows are called out
47-Floor/platform/wall/dike penetrations are indicated
48-Control valve manifolds are self-supporting when the break-out spool is removed
49-You know the design difference and cost involved between: Slope, draining system,
      no pocket - they are not the same thing
50-All annotated/backdrafted items/text/details receive a second look 51-Reducing tees are called
     out
 
This Check List that already inform below hopefully can help you to get the good design of the piping drawings and can help you to to re route the flowing of how to design of  piping drawings.
 
Sources :  Friends from Flour Daniel Inc.

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