Monday, September 13, 2010


Here Another information for the Piper (Piping Construction) for the right procedure or some of check list for to do the right of the piping installation.
The Piping Designer Check List procedures are  part of the Piper's Check List, So on this case the Piping Construction personal (Piper's) should know how to read the drawings. But hoping the piper can be read the drawings are depant on the piping designer. Because sometimes the piping drawings are not show anything.
Hopefully, if the piping engineer and the piper are following this check list, can make eisier the piping construction and installation.

Please see the check list :

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,
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
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, FREE
      DRAINING, NO POCKETS - they are not the same thing
50-All annotated/backdrafted items/text/details receive a second look

51-Reducing tees are called out
52-All material data has been inputted
53-All parts of the configuration are correctly assigned to either fabrication in the shop or
     are assigned to the field for fabrication
54-The internal cleaning box is correctly filled in
55-The seal welding box is correctly filled in
56-Field welds and field fit-up welds are correctly located (mark pieces fit in the box)
57-The continuation sheet call out is correct
58-Field welds and field fit-up welds are at every sheet continuation where appropriate
59-Correct flange types are used
60-Bolts and gaskets at sheet continuations are on the correct sheet

61-All clashes are resolved (IDP)
62-Mark piece is maximum size for shipping box (considering all FW factors) - to maximize
     box use
63-Couplings are properly used with swages
64-The isometric is fully dimensioned
65-Common BOP called out at dummy supports
66-Dummy welds are indicated
67-Vents and drains are logical (no duplication & are in the correct location)
68-No error reading indicated in the parts list
69-Insulation code
70-Insulation thickness

71-Paint code
72-Stress requirement
73-Reference P&ID
74-Temperature & pressure information
75-ASME Code
76-PWHT (Postweld Heat Treatment)
77-Heat tracing
78-Reference plan drawing
79-Stray notes, text & elements
80-Correct text size

After you read the list below, its can help you for your piping installation for more easier...

Sources :  Friends from Flour Danier Inc.

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