All piping and tubing shall be rigidly supported to avoid vibration. Maximum unsupported span shall be as follows:

• ¹/ ₂-in. lines 2 ft 0 in.

• ³/ ₄-in. lines 2 ft 6 in.

• 1-in. lines-3 ft 0 in.

Exceptions: Longer unsupported spans for piping runs between machines, lube oil consoles, and instruments panels.

^[*] All piping systems shall have valved high point vents, valved low point drains, and valved bleeds on gauge glasses and pressure gauges.

^[*] A block valve shall be installed between each instrument and the connection and shall be located close to the line, vessel, or machinery.

Stainless steel shall be used for control, lube, and seal oil lines downstream of the filters.

All openings shall be plugged or blanked to keep out foreign matter.

Threaded reducing bushings are not permitted.

All-thread nipples are not permitted.

Nipples shorter than 2 in. (including thread and/or socket lengths) are not permitted.

Hex head plugs are not permitted. Round barstock plugs shall be used.

Unions are not permitted. Exceptions: In cooling water service and where the union can be isolated without machinery shutdown.

^[*] The minimum size of piping connections shall be ¹/ ₂ in. NPS.

^[*] Piping branch connections less than 2 in. NPS shall be gusseted. Refer to sketch, to be provided by owner's engineer.

Flanged connections shall be provided to permit removal or assembly of equipment and shall...