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Joint Protection of Pre-Insulated Pipes
| JOINT PROTECTION WITH TIAL-TUM ONE-PIECE CASING |
TIAL-TUM one-piece heat-shrinkable casing is specifically designed for complete joint protection of pre-insulated pipelines for underground laying.One-piece structure of the casing allows to execute waterproofing that meets the highest requirements, though the installation is carried out in a simple way which does not require high qualification of field crew. This one-piece structure eliminates the need of additional end seals.
TIAL-TUM is manufactured of HDPE via extrusion process followed by specifically oriented stretching to obtain shrinkage. The casing is cross-linked to prevent buckling and to impart excellent mechanical strength due to high impact, indentation and abrasive resistance. |
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| RECOMMENDED CASING LENGTH |
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The inner non-shrinkable HDPE layer is built into the middle section of TIAL-TUM system to prevent deformation. This extremely solid layer structure additionally reinforces the construction to provide full resistance to soil stress.
TIAL-TUM is used together with TIAL-Z unique hotmelt adhesive. TIAL-Z serves for complete and long-term sealing of casing ends thanks to its high peel and lap shear strength. TIAL-Z is supplied as part of TIAL-TUM set preliminary cut for specific diameter. As an option TIAL-Z can be supplied in 30 m rolls.
TIAL-TUM operates at environmental temperatures from - 60 to + 60 °С.Lifetime of TIAL-TUM casing is minimum 45 years. |
| ORDERING INFORMATION: |
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*Standard length can be changed upon customer request.
BENEFITS
- complete sealing
- comprehensive weld joint area protection againstunderground, flood and other waste waters
- no deformation due to hardness of middle section layer
- no additional end seals
- excellent resistance to soil stresses
- complete set of component parts
- over 30% shrinkage
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JOINT PROTECTION WITH TIAL-M SLEEVES
ТIAL-М heat-shrinkable wrap-around sleeve is used for sealing of weld joint areas of pre-insulated pipelines.
The sleeve has two-layer structure (PE backing and hotmelt adhesive).
The backing provides with high indentation resistance, impact strength and extremely low moisture absorption. The backing is cross-linked to prevent tape from buckling and to impart specific mechanical strength and resistance to UV-radiation.
Adhesive layer of the sleeve possesses high peel and shear strength.
TIAL-M sleeve is fixed on the pipe surface with the help of TIAL-ZP fiberglass reinforced closure patch.
The closure patch is delivered in set together with the sleeve.
To ensure mobility of the works and to simplify logistic schemes TIAL-M sleeves can be delivered in 30 running meter rolls. The rolls are cut to the required length by installation crew on site.
Lifetime of TIAL-M sleeve is minimum 45 years.
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| SEALING OF PRE-INSULATED JOINTS WITH TIAL-M SLEEVE |
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BENEFITS
- complete sealing
- comprehensive weld joint area protection against underground, flood and other waste waters
- high peel and shear strength
- excellent resistance to soil shear forces
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| UNDERGROUND PIPELINES PRE-INSULATED WITH POLYURETHANE FOAM (PUF) SHELLS |
Nowadays heat-shrinkable all-in-one casings for sealing of pre-insulated pipeline joints are preferable. However when the carrier pipe sections has been already welded the tubular casing can not be installed. In this case TIAL-M wraparound sleeve is an indispensable product for coating of joints of pre-insulated pipes.
Taking into account economical aspect, application of the sleeve is more preferable due to lower cost of the sleeve in comparison with one-piece casing. Additionally, time for installation process is greatly minimized. These both factors significantly reduce the cost of pipeline construction. |
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| When there are no strict requirements to hardness of the coating, TIAL-M sleeve is the ideal decision. |
| UNDERGROUND PIPELINES PRE-INSULATED WITH PE OR STEEL PROTECTIVE JACKETS |
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| Another means to replace all-in-one casing for sealing of joint areas of buried pre-insulated pipelines is PE or zinc-galvanized steel jacket application. The jackets impart additional hardness to the whole coating system for a joint. In this case TIAL-M sleeve is the ideal decision for waterproofing of the whole system protecting joint area. |
| ABOVEGROUND PIPELINES PRE-INSULATED WITH GALVANIZED STEEL PROTECTIVE JACKETS |
Qualitative sealing of joint areas is always an important goal during exposed pre-insulated pipeline construction. TIAL-M sleeve is optimal decision when the main coating of the pipeline is zinc-galvanized steel.
In place where PU foam and galvanized steel contact each other there is often a problem to resist different speed of PUF and steel cooling down.TIAL-M sleeve eliminates this specific problem due to its high durability. |
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