All In One Info Avail: Pipe Rack Piping

Pipe Rack Piping – Tier Loading

• Locate larger and heavier lines as far as possible close to the pipe rack column on each side

• Locate Process lines preferably on first tier

• Locate Utility lines on above the process lines on upper tiers. Small size lines preferably on center of top tier.

• Locate Steam and Condensate headers on top tiers preferably near to the columns so that loops are accommodated and supported within the pipe rack structure

• Locate very large size cooling water lines on lower tiers

• Preferably Cable trays are to be located on top level of pipe rack

• Spacing between lines shall be as per project requirement

• Maintain same back off pipe clearance for all the lines coming down from the pipe rack

• During the early stage of the pipe rack design development, preliminary flexibility analysis of critical lines must be carried out by Stress group and fix anchor bay locations

• Expansion loops to be indicated by Stress engineer. Care should be taken to ensure that loops are supported and accommodated within the pipe rack structure.

• Line spacing should be checked for linear expansion at change of direction

• Locate Flare header at a height such that the Safety Valves can be kept as low as possible, preferably on top most tier to ensure sufficient slope for self-drain into K.O. Drum.

• PSV out let tapping to flare header shall have 45° lateral connection in line with flow direction of header towards K.O. Drum

• Lines crossing battery limits normally will have valve and blind which requires access.

• Valves will be staggered either side of walkway to provide maximum clearance and be provided with extension spindles to handwheels as required.

• Where lines are to cross battery limit at grade, valves will be brought down for access. This configuration can also be followed at elevated battery limit structure.

• See diagram, liaise with the Piperack structural steel designer to establish pipe rack design at the battery limit and to establish the required headroom clearance over the lower walkway.

• A simpler method of accessibility to battery limit valves is achieved as shown on diagram but is dependent on the pipe rack design and the possible additional pipe support required for the overhead loop.