Bonded Liner High Integrity Heads

Edlon's thermoformed vessel heads provide the highest liner reliability in the market:

• Thermoformed precision-fitted heads
• Significant elimination of air-welded seams
• Use of pure fusion welds
• Low stress / low permeation designs
• Exceptional liner life of 2-5x over competitors
• High value for customers wanting trouble-free operation

Pie-Shaped Head Sections	Edlon's Fusion Welded & Formed Head
Pie sections 'approximate' the head shape, but leave gaps with improper fit and inadequate adhesion to substrate surfaces	Heads thermoformed for exact fit and exceptional bondability to substrate
Air welds are inherently high stress, which can lead to premature liner failure	PureFusion™ welds used as principal film joining method
More sections require substantially more air welds, and each weld becomes an additional risk site for liner failures	Fewer seams = less possibility for problems
	Use of low stress design and PureFusion™ welds greatly improves liner life

Edlon's lined vessel heads are fabricated using proprietary techniques that allow us to offer vastly superior product over our competition:

Thermoforming:

Vessel and tank heads fabricated at Edlon are thermoformed and installed as a single piece.  The industry-standard of installing vessel heads in pie-shaped sections results in unnecessary air and hand welds, which increase the chance for failure along a linear seam.  On a 10 ft. diameter tank, pie-shaped head sections could mean up to 140 ft. of unneeded hand welds.

Reduction of Air and Hand Welds:

Air and hand welds found in the industry-standard lined tank create areas that are easily susceptible to stress-cracking and other modes of failure leading to debonding.  Edlon PureFusion™ welds all welded joints whenever possible to ensure that our lined products will stand up to and last in the harshest of process conditions.

Fusion Welded Nozzles:

Wherever possible, Edlon's nozzles are PureFusion™ welded into the vessel liner.  Fusion welded seams offer strengths nearly identical to the virgin liner film.  In addition, fusion welds significantly reduce stress and risks of stress-cracking typically associated with air and hand welds in high-stress areas.

Reduction of High-Stress Areas:

Elimination of air and hand welds from vessel heads means that the high-stress areas found around all liner and nozzle seams are drastically reduced.  Permeation through a weak air weld, one of the most common modes of failures in a lined tank, becomes much less of a concern when all welds are PureFusion™ welded and high-stress areas are eliminated.