Bolt Brokers supplies GPT Industries flange isolation kits (also called insulating kits or FIKs) — isolating/sealing gaskets plus sleeves and washers for electrical isolation, cathodic-protection breaks, and flange-face corrosion control. Quote-first for contractors and plant buyers across the Western USA.
A complete flange isolation kit seals the joint and electrically isolates one flange from the other. That matters for cathodic protection systems, dissimilar-metal flanges, and preventing flange-face corrosion in pipelines, waterworks, and plant piping.
GPT builds isolation products from engineered laminates and sealing elements. Components can ship separately or as a matched kit. As a GPT Industries distributor, Bolt Brokers helps you pick the right series for pressure class, media, and facing — then sources it to the RFQ.
Typical insulating-kit stack for education: gasket between flanges, sleeves on bolts, insulating washers, then steel washers and nuts. Exact materials follow the GPT series you specify.
Retainer extends to the flange outside diameter with holes at the bolt circle. Common on flat-face flanges and where full-face coverage is specified.
Retainer sits inside the bolt circle; bolts/studs center the gasket. Widely used on raised-face flanges when a ring gasket is called out.
Below is an educational overview of major GPT insulating-gasket lines. Final selection depends on flange class, temperature, media, and drawings. Brand names are GPT / Pikotek / PSI trademarks; descriptions are rewritten for customer education.
High-strength isolating gasket platform for aggressive services and higher flange classes. Often specified where sealing performance and electrical isolation both matter. Suitable for demanding ANSI / API class work when matched correctly.
Adds fire-service sealing capability to the VCS platform for applications that require isolation performance plus fire-test considerations. Ask us when fire specs appear on the datasheet.
For elevated-temperature flange isolation where standard laminates may not hold. Useful on load-compromised or heavily bolted connections when the engineer calls for high-temp isolation.
VCS-style platform with an internal PTFE seal near the bore for tight sealing against internal pressure and aggressive media. Spec when ID sealing is called out.
Uses a rectangular “quad” sealing element and groove design to seal and isolate many flange types. Available in Type E or F with single, double, or one-piece sleeve/washer options.
LineBacker variants certified to drinking-water health-effects criteria where NSF/ANSI 61 compliance is required. Confirm current certification on the specific part before potable-water install.
Economical GRE-based isolation alternative to older phenolic kits for many Class 150–600 style services. Strong option for dissimilar-metal flanges and flange-face corrosion control when class allows.
Fully encapsulated isolating gasket design with a thinner profile aimed at easier handling versus thicker legacy stacks. Ask when EVOLUTION is named on the BOM.
We can also quote related GPT hardware when it appears on the same RFQ — strainer-style LineBacker gaskets, coated isolation washers, orifice plates, and accessory lubricants — based on your documents.
Pipeline flange isolation for CP systems, station piping, and high-integrity sealing where isolation gaskets are specified.
Waterworks flanges, treatment plants, and potable lines when isolation and approved materials are required.
Break galvanic couples between flange materials that would otherwise corrode at the face.
Process piping, terminals, and maintenance replacements — match kit series to the existing standard on the isometric.
Cleaner take-offs get faster quotes. Include as much of the following as you have:
Also quoting NBG kits, steel couplings, and industrial fasteners on the same job? Send one combined RFQ — we broker the package.
Use GPT Industries’ official flange isolation torque resources to size bolt torque for your gasket series, flange standard, bolt grade, and friction factor. Bolt Brokers links you to the manufacturer tools — always confirm final values against the project spec and GPT installation instructions.
While GPT’s interactive calculator is being updated, use these official manufacturer tables:
Most common pipe flanges — GPT bolt torque table at 0.11 friction factor.
Download PDFLarge-diameter Series B flanges — GPT bolt torque table at 0.11 C.o.F.
Download PDFWellhead / API 6A flange torque guidance from GPT at 0.11 C.o.F.
Download PDFWaterworks ring flanges — GPT bolt torque table at 0.11 C.o.F.
Download PDFDisclaimer: Torque values depend on bolt condition, lubrication, flange material, and gasket series. Tables and calculators are provided by GPT Industries for guidance. Bolt Brokers does not replace project engineering — when in doubt, use GPT max values for fire-risk service or contact us and we’ll help pull the right GPT document for your kit.
Need a kit quoted with the matching install sheet? Request a quote or call (951) 232-0111.
A flange isolation kit (insulating kit / FIK) usually includes an isolating gasket plus insulating sleeves and washers so the joint seals while keeping the flanges electrically isolated.
The gasket is the sealing/isolating disc between flange faces. A full kit adds the sleeves and washers needed for bolt isolation. Many RFQs mean the complete kit when they say “insulating kit.”
Yes. Bolt Brokers is a GPT Industries distributor and regularly quotes GPT flange isolation gaskets and kits for Western USA jobs.
Often yes — GPT components can be ordered alone or as matched kits. Tell us what the drawing calls for.
Send size, class, facing, series if known, and quantity. Clear RFQs are typically turned same business day when suppliers confirm stock.
Use the GPT Torque Calculator section on this page for the official GPT product calculators and C.o.F. 0.11 bolt torque tables (B16.5/B16.47, API 6A, AWWA C207). Always cross-check the install sheet for your exact gasket series.