GPT, a division of EnPro Industries, is the world’s leading manufacturer of critical pipeline sealing
and electrical isolation products. With a focus on safety, performance and reliability, we employ advanced engineering and manufacturing processes to meet the challenging demands of the oil and gas, water/wastewater, and construction and infrastructure industries.
With a global production, distribution and support network, we are positioned to meet our customers’ needs with unprecedented responsiveness and expertise.
Safety is the foundational objective of everything we do at GPT.
We've been selected by EH&S magazine three times as "The Safest Company in America". The only company ever to have done so.
Quality and compliance are a top priority for EPC applications. Compliance with international regulatory standards are essential for risk management, and employing durable, high-performance and precisely engineered solutions is imperative to meeting these standards and preventing contamination.
GPT assists in this critically important task with sealing and corrosion prevention products that conform to the highest international regulatory standards, including:
NSF / ANSI 61
EN – 13555 (Leakage Test) *
ISO 9001: 2015
Material Test Certifications EN 10204 Type 2.2, 3.1
NACE MR 0175 API 1104
SHELL T – 2.973.758
ABS Certificate of Product Design of Assessment
Made In America
ASME B16.5 Working Pressure Conformance
ASME B31.1, B31.3
Lloyds Pressure Certificate *
ASME Section V
Chevron Fugitive Emissions
ARAMCO 9COM Approval (FIK)
TA LUFT (VDI 2200)
ISO – 15848
DIN – DVGW
DNV CLASS A
* Fees apply for nonstandard certifications
GPT stands behind its sealing and corrosion prevention solutions with an expert team of applications engineers and laboratory professionals to provide comprehensive global support for your sealing and cathodic protection needs.
From field training to on-site inspection and laboratory conformity analysis, we have the resources and personnel to ensure you stay safe, on schedule and within budget.
Technical sales support
Hydrotest * (Extended Hydro may incur fee)
Custom designed products
Holiday test *
Coating thickness test *
Product specification support
On-site and virtual training *
Xray test *
Field support *
Dye penetrant test
Product analysis reports
Destructive testing *
Lab and testing facilities to accommodate customer requirements *
OES and XRF PMI Chemical Testing*
Elastomer rheology & viscosity
Intergranular Corrosion Testing *
DIN 3535 leakage test *
Tensile & Yield Testing*
Cyclic Corrosion Testing*
Advanced seal tester variable load & temp
High pressure/high temperature leakage tests
UltraSonic phased array test
Scratch Testing *
Magnetic particle test
Pneumatic test * (Extended Pneumatic may incur fee)
* Fees apply
GPT flange isolation(insulation) products are constructed of premium engineering materials. The isolation products include a wide selection of isolating/sealing gaskets along with a variety of sleeves and washers. For maximum flexibility, components may be ordered separately or as part of complete flange isolation kits (FIK).
GPT engineers and manufactures a range of high quality sealing and isolating products used to ensure the safe flow of fluids in transmission, distribution and process piping systems. Flange isolation products include a wide selection of isolation joints and spools that are available in all pipe sizes, types, pressure ratings, and materials.