CIPP Inner Bladder and Outer Membrane
We do not install CIPP pipe. We supply flexible plastic used to fabricate CIPP pipe.
Background:
CIPP pipe was developed to replace pipe without digging a ditch. The first implementation was in 1971; US patent 4009063 was granted to Eric Wood in 1977. Cured-in-place pipe was commercialized by Insituform Technologies which is now a subsidiary of Aegion.
While the original polymer called out in claim #17 was polythene, the industry has generally moved away from polythene a.k.a. polyethylene. We have a specific polyethylene for the outer membrane as well as heat resistant seamless tubes made from other polymers for the calibration hose or inflatable inner tube. Both comply with ASTM F 1216 and
ASTM F 1743.
Our CIPP curing hoses are heavy metal free and exceed the requirements NSF 61 for lead free drinking water.
Whether you are using pulled-in-place or direct inversion, hot water / steam or UV curing, we have the cure for your
cured-in-place plastic needs.
While the original polymer called out in claim #17 was polythene, the industry has generally moved away from polythene a.k.a. polyethylene. We have a specific polyethylene for the outer membrane as well as heat resistant seamless tubes made from other polymers for the calibration hose or inflatable inner tube. Both comply with ASTM F 1216 and
ASTM F 1743.
Our CIPP curing hoses are heavy metal free and exceed the requirements NSF 61 for lead free drinking water.
Whether you are using pulled-in-place or direct inversion, hot water / steam or UV curing, we have the cure for your
cured-in-place plastic needs.
Pre-Liners isolate the cured in place CIPP tube from the host tube and groundwater. Heat resistance is not a factor. We custom manufacture pre-liners which conform to the configuration of each job.
CIPP Inner Bladder
The inflatable pipe lining bladder is also called a calibration hose, inversion bladder, stay-in-place calibration hose or inner sleeve.
The bladder’s function is:
1. to provide pressure against the inner wall of the outer membrane during curing and
2. to provide a pathway for the curing agent which can be either hot water, steam or U V.
The selection of raw material must be appropriate for the curing method. The plastic must stand up to the working temperature of the curing agent if hot water or steam is used as a curing catalyst. Obviously, if UV curing is utilized, the tube cannot be opaque.
We have seamless tubing for any working temperature or for UV. The Achilles heal of inner bladder tubes made by lap sealing polyurethane or PVC is the strength of the longitudinal seal. The seal is the weakest point. This dictates the required thickness of the outer membrane. By contrast, a seamless tube has uniform strength. This means a thinner wall will do the job. Ramifications are lower cost and longer rolls.
Calling out the polymer type such as polyethylene, polypropylene or polybutylene is not of primary importance. What does matter is advising us of the working temperature and means of curing.
Let us know these conditions so we can custom manufacture an inner bladder made to precision diameter which can take the heat. It gets better. We make tubing on short order.
Let us show you how our tubing:
• can take the heat
• thrives under pressure
Associations:
We are members of the following associations:
The bladder’s function is:
1. to provide pressure against the inner wall of the outer membrane during curing and
2. to provide a pathway for the curing agent which can be either hot water, steam or U V.
The selection of raw material must be appropriate for the curing method. The plastic must stand up to the working temperature of the curing agent if hot water or steam is used as a curing catalyst. Obviously, if UV curing is utilized, the tube cannot be opaque.
We have seamless tubing for any working temperature or for UV. The Achilles heal of inner bladder tubes made by lap sealing polyurethane or PVC is the strength of the longitudinal seal. The seal is the weakest point. This dictates the required thickness of the outer membrane. By contrast, a seamless tube has uniform strength. This means a thinner wall will do the job. Ramifications are lower cost and longer rolls.
Calling out the polymer type such as polyethylene, polypropylene or polybutylene is not of primary importance. What does matter is advising us of the working temperature and means of curing.
Let us know these conditions so we can custom manufacture an inner bladder made to precision diameter which can take the heat. It gets better. We make tubing on short order.
Let us show you how our tubing:
• can take the heat
• thrives under pressure
Associations:
We are members of the following associations:
CIPP Outer Membrane
The CIPP outer membrane is comprised of felt
which has been impregnated with a resin - an isophthalic polyester or 2 part epoxy, laminated to an outer skin of flexible plastic sheet.
The felt is about 1½ inches narrower than the outer plastic membrane so it can be sealed in a “lap seal” fashion to create a tube.
The tube is fan - folded for compact shipping.
Wrinkling on lateral turns is inevitable. Wrinkling can be minimized by using a plastic sheet film which is pliable and as thin as possible. As with the inflatable inner tube, the trend has been away from the original polythene to PVC. Heat resistance is not a factor for the outer membrane outer wall.
Our METSFT offers four advantages over PVC :
1. METSFT is easily heat sealed without the need for RF welding. Heat sealing is faster and cheaper than RF sealing. Converting to heat sealing from RF welding is cheap with a rapid payback. Call us if you need to know how to set up a machine direction sealer.
2. METSFT is more pliable than most PVC (we say “most” because there are a variety of grades of PVC) making it a natural if lateral bends are necessary.
3. METSFT is a better environmental choice. It does not contain phthalates or other toxic chemicals which will eventually leach into the ground water as PVC degrades. METSFT has been used in medical applications requiring a PVC substitute since 2002.
4. Cost METSFT is 30% less dense than PVC, so there is a cost advantage pound for pound. Downgauging, or using less wall thickness, also reduces cost. Because we make film to order, you don’t have to settle for stock thicknesses. We can make your outer membrane custom tailored to the requirements of each specific job.
The felt is about 1½ inches narrower than the outer plastic membrane so it can be sealed in a “lap seal” fashion to create a tube.
The tube is fan - folded for compact shipping.
Wrinkling on lateral turns is inevitable. Wrinkling can be minimized by using a plastic sheet film which is pliable and as thin as possible. As with the inflatable inner tube, the trend has been away from the original polythene to PVC. Heat resistance is not a factor for the outer membrane outer wall.
Our METSFT offers four advantages over PVC :
1. METSFT is easily heat sealed without the need for RF welding. Heat sealing is faster and cheaper than RF sealing. Converting to heat sealing from RF welding is cheap with a rapid payback. Call us if you need to know how to set up a machine direction sealer.
2. METSFT is more pliable than most PVC (we say “most” because there are a variety of grades of PVC) making it a natural if lateral bends are necessary.
3. METSFT is a better environmental choice. It does not contain phthalates or other toxic chemicals which will eventually leach into the ground water as PVC degrades. METSFT has been used in medical applications requiring a PVC substitute since 2002.
4. Cost METSFT is 30% less dense than PVC, so there is a cost advantage pound for pound. Downgauging, or using less wall thickness, also reduces cost. Because we make film to order, you don’t have to settle for stock thicknesses. We can make your outer membrane custom tailored to the requirements of each specific job.
For more information on CIPP pipe lining check out the following links:
• Trenchless Technology Guidelines for Cured in Place Lining Systems
• CIPP Lining Tubes.
• CIPP Point Repair Systems
• View Pipe Inspection and CIPP Installation Videos
• View Animation of CIPP Installation
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