Thermoplastic Isolator (TPI)

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PT&P’s TPI  – The Lowest Cost, Most Comprehensive Solution for Corrosion at Pipe Supports

PT&P has consulted with hundreds of customers on one of the most common problems for operating plants – corrosion at the point of contact between the steel pipe and the steel pipe support. As seen in Figure 1, a crevice is formed at the point of contact. When water accumulates in the crevice, the oxygenation level of the water at the surface is higher than the water at the depth of the crevice.

Figure 1 Crevice Corrosion

PT&P has used its 40+ years of experience as a leader in pipe supports in designing our TPI solution to be the most effective and easiest to deploy solution in the market. Key advantages of PT&P’s TPI offering include:

Economical Pricing – PT&P’s TPI offering is priced to be highly cost-effective compared to other providers

Highly Customizable – Our unique manufacturing approach allows us to customize far more easily than any other provider. Customization options include height/width/length of TPI, hole sizes, hole locations, and special shapes. *View more on manufacturing

Complete Assemblies – PT&P reduces complexity in product selection by offering complete assemblies rather than just individual components. We are the only provider of TPI type of solutions that is not a “point solution” provider. Also, we are the ONLY global provider to integrate vibration pads and TPI into our assemblies. If you wanted to purchase a configuration for a clamp with both TPI equivalent and vibration pads, you would have to develop the design, source the materials with requests for customization, and assemble it yourself.

Assemblies that can be purchased include:

U-Bolts – including the addition of vibration pads (optional) – see Figure 2

Clamps – PT&P’s entire range of clamps can be integrated with TPI Clips as well as vibration pads – see Figure 3

Hold-Downs – PT&P’s entire range of Hold-Downs can be integrated with TPI clips and rods as well as vibration pads – see Figure 4

Figure 2 – PT&P Super U-Bolt with TPI and Vibration Pad	Figure 3 – PT&P Pre-Assembled Pipe Clamp with TPI Clips and Vibration Pad	Figure 4 – PT&P Pre-Assembled Hold-Down Pipe Clamp with TPI

Extreme Loads and Temperature Requirements – PT&P has extensive experience supporting custom requirements. We can develop solutions for unique scenarios by selecting different materials and developing a custom design. *View more on Finite Element Analysis (FEA)

Proven Performance – the performance of PT&P TPI is comparable to or superior to other providers. We have supplied solutions to the largest Engineering, Procurement, and Construction (EPC) in the US as well as many major Oil and Gas and Chemical operating companies.

For PT&P U-Bolts, Clamps, and Hold-Downs, all items in the PT&P catalog can be ordered with TPI. However, the addition of TPI will alter the clamp or hold-down sizing requirement. PT&P simplifies the process by taking care of all the work in terms of designing the appropriate clamp sizing to accommodate the TPI and vibration pad if that is added.

PT&P needs the following information for completed assemblies:
U-Bolts – specify U-Bolt figure and whether a vibration pad should be added *View Super U-Bolts
Clamps – specify clamp type, pipe size and whether a vibration pad should be added
Hold-Downs – specify pipe size and Hold-Down type and whether vibration pad should be added

TPI can also be ordered stand-alone. It is also offered in strip format, clips, or pre-configured to be part of a U-Bolt. TPI Strips are offered in the sizes shown below. PT&P will cut to length per the customer request with lengths up to 10 feet.

Figure 5 PT&P TPI Strip Options

PT&P options for TPI clips are shown in Figure 5. For clips, customers need to specify the width of clamps.

Figure 6 PT&P Clip Options

For TPI U-Bolts Strips (e.g. PT&P does not supply U-Bolt, just TPI), Figure 6 shows PT&P options.

Figure 7 TPI U-Bolt Strip Options

Installation of TPI:

TPI can be placed or attached to structural steel by three different methods.
•  Self-tapping screw or bolting
•  Double-sided adhesive tape
•  With u-bolt

There is a total of 3 different types of TPI available based on thermal properties.
•  TPI White – Maximum Service Temperature 181°F
•  TPI Amber – Maximum Service Temperature 340°F
•  TPI Tan – Maximum Service Temperature 480°F

The tables below show a comparison of TPI versus a leading competitor.

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