Gage glasses and cocks

Instructions for ISA Form S20.28

1) Check what is to be supplied, and whether assembled or unassembled.

2) Select one type only per sheet.

3) Specify size, style and location of process connections. If side or back connections are used, vent and drain connections are available.

4) Material of gage glass chamber and connections.

5) Specify minimum rating. It is assumed that a higher rating is also acceptable.

6) This section is used only if the option applies to all items listed on the sheet. Where options apply to certain items only, use the notes column instead.

7) Use for Manufacturer and Series or Type; detailed number may be listed in the tabulation.

8) Select style of cock, if used.

9) Show connection sizes only.

10) Write in body and trim materials.

11) See Line 5 above.

12) Specify action and type of handle: plain closing or quick closing; handwheel or lever handle. This may be covered by the Model No. given on Line 17.

13) Specify type of connection on each side: plain union, spherical union, solid shank. Give flange size, rating and type, if applicable.

14) Bonnet may be screwed, union type, or bolted.

15) Options checked here apply to all items. See line 6 above. Include special packing.

16) Fill in if required, or as a final record after selection is made.

" CONN" in tabulation refers to distance between center lines of vessel connections. This figure, along with the visible glass dimension, defines the length of the column. A secondary sheet with tabulation only may be made up if required.

CL

28