Poly Processing Expansion Joint Required Large Tanks

Direct answer: Poly Processing's own plumbing specifications state expansion joints are required on tanks larger than 600 gallons to absorb expansion/contraction and isolate vibration/shock from pumps and piping, and explicitly must NOT be attached directly to the tank wall or IMFO - a full-face flange is a mandatory prerequisite. This is a hard installation constraint that would otherwise produce a tank/piping damage risk on any 600+ gallon system quoted without it.

Confidence: confirmed

Applies when	expansion joint, flexible connector, tank vibration, pump piping stress
Avoid	expansion joint attached directly to tank wall or IMFO without a full-face flange, no expansion joint on tanks over 600 gallons (undefined)
Recommend instead	Poly Processing PTFE Expansion Joint or EPDM Expansion Joint ()
Rationale	Poly Processing's own plumbing specifications state expansion joints are required on tanks larger than 600 gallons to absorb expansion/contraction and isolate vibration/shock from pumps and piping, and explicitly must NOT be attached directly to the tank wall or IMFO - a full-face flange is a mandatory prerequisite. This is a hard installation constraint that would otherwise produce a tank/piping damage risk on any 600+ gallon system quoted without it.
Confidence	confirmed
Source	vendor-sources/poly-processing-fittings-accessories.md

Applies when

expansion joint, flexible connector, tank vibration, pump piping stress

Avoid

expansion joint attached directly to tank wall or IMFO without a full-face flange, no expansion joint on tanks over 600 gallons (undefined)

Recommend instead

Poly Processing PTFE Expansion Joint or EPDM Expansion Joint ()

Rationale

Poly Processing's own plumbing specifications state expansion joints are required on tanks larger than 600 gallons to absorb expansion/contraction and isolate vibration/shock from pumps and piping, and explicitly must NOT be attached directly to the tank wall or IMFO - a full-face flange is a mandatory prerequisite. This is a hard installation constraint that would otherwise produce a tank/piping damage risk on any 600+ gallon system quoted without it.

Confidence

confirmed

Source

vendor-sources/poly-processing-fittings-accessories.md

This is a general engineering rule derived from real field/case-study evidence, not a substitute for a project-specific specification review — confirm against your exact process conditions before ordering equipment.

Source: Liberty Chemical Equipment & Supply, Inc. (LibertyCES) — engineering data compiled from real vendor and field-verified sources. For a free spec review, call James Riggins at (559) 395-5500 or email james@libertyces.com / sales@libertyces.com. Website: libertyces.com.