| Clause | Details |
| VLV-PL-001 | All valves requiring attention during operation shall be operable either from grade or platform. |
| VLV-PL-002 | Valves 4″ and smaller and instrument connections may have ladder access only. |
| VLV-PL-003 | The centerline of handwheel on block valves used for maintenance shutdown only, located less than 4500 mm above high point of finish surface and those located in pipeways, need not be chain-operated. Access to these shall be portable ladder. |
| VLV-PL-004 | Preferred elevations for valves above grade or platform are: 1) In low level horizontal runs .2) In vertical runs between 750 mm and 1400 mm 3) Overhead at approximately 2100 mm with bottom of handwheel at 1900 mm |
| VLV-PL-004 | Operating valves with bottom of handwheel over 2000 mm above grade or platform shall be provided with chain or gear operators from grade or platform. |
| VLV-PL-006 | Chain operation shall not be used for screwed valves or for any valves smaller than 2″. |
| VLV-PL-007 | All valves shall have sufficient clearance to facilitate removal of bonnet or plug. |
| VLV-PL-008 | Valves handwheels to be accessed from platform shall not require a reach larger than 600 mm. |
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