Plastic-lined pipe testing service

Plastic-Lined Pipe Testing Service for Global Corrosion-Resistant Piping Compliance

As an ISO/IEC 17025 accredited laboratory, we deliver a specialized plastic-lined pipe testing service that verifies liner thickness, bond integrity, pressure retention, chemical resistance, thermal cycling performance, and long-term durability of plastic-lined steel pipes and fittings. Our plastic-lined pipe testing service supports manufacturers and exporters of PTFE, PFA, FEP, PVDF, PP, and other polymer-lined piping systems who must demonstrate conformity to ASTM F1545, ASTM F423, DIN 2876, NACE SP0391, and regional pressure equipment standards across the European Union, North America, the Middle East, and Asia. Every test is performed under our CNAS-accredited quality system, producing reports accepted by notified bodies, plant inspectors, and procurement teams worldwide.

Product Samples We Regularly Test in Our Plastic-Lined Pipe Testing Service

PTFE-lined carbon steel and stainless steel pipes — for corrosive chemicals, high-purity water, and pharmaceutical process lines
PFA and FEP-lined pipes and fittings — for semiconductor, ultrapure water, and high-temperature corrosive service
PVDF and PP-lined pipes — for acids, alkalis, and industrial wastewater in chemical plants
Elastomer and rubber-lined pipes — for abrasive slurries, flue gas desulfurization, and mining applications
Flanged, threaded, and custom-end plastic-lined pipe spools — for complete piping system integration
Lined tees, elbows, reducers, and instrument connections — with molded or extruded liners for full-bore corrosion protection
Field-fabricated and repaired plastic-lined pipe assemblies — for fitness-for-service verification and remaining life assessment

Liner Thickness and Integrity Measurement in Our Plastic-Lined Pipe Testing Service

Liner thickness measurement by eddy current and magnetic induction per ASTM F1545 and ISO 2178 — the thickness of the plastic liner is measured non-destructively at multiple points along the pipe length and at fittings, verifying the liner meets the specified minimum thickness for corrosion protection and permeation resistance.
Microscopic cross-section examination per ISO 1463 — the pipe is sectioned and the liner-to-steel interface and the liner thickness are directly observed under a calibrated microscope, providing referee data and detecting voids, inclusions, or delamination.
Liner continuity and holiday detection by high-voltage spark testing per ASTM F1545 and NACE SP0391 — the entire lined surface is scanned with a high-voltage spark tester to detect pinholes, cracks, and thin spots in the plastic liner that would expose the steel substrate to the corrosive process fluid.
Liner surface roughness and waviness measurement per ISO 4287 — stylus profilometry quantifies the Ra and Rz values of the liner bore to verify the specified surface finish for flow efficiency, cleanability, and resistance to fouling.
Dimensional verification of lined pipe bore and flange faces per ISO 2768 — laser micrometers and coordinate measuring machines verify the inside diameter and the flange sealing faces, ensuring the plastic-lined pipe mates correctly with gaskets and adjacent equipment.

Adhesion and Bond Strength Testing for Plastic-Lined Pipe

Liner-to-steel bond strength by pull-off and peel methods per ASTM D4541 and ASTM D413 — the force required to separate the plastic liner from the steel pipe wall is measured, verifying the adhesive or mechanical bond is sufficient to withstand thermal cycling, vacuum conditions, and mechanical stress without liner collapse or detachment.
Liner adhesion after thermal aging and chemical exposure per ASTM F1545 — the bonded liner is subjected to elevated temperature and chemical immersion, and the retained adhesion is measured to predict long-term liner stability in the service environment.
Vacuum resistance and liner collapse testing per ASTM F1545 — the plastic-lined pipe is subjected to full vacuum at ambient and elevated temperatures, and the liner is inspected for inward collapse, buckling, or separation from the steel shell, verifying the liner remains dimensionally stable under negative pressure.
Flange face liner adhesion and sealing surface integrity — the molded or flared liner on the flange faces is tested for adhesion and surface condition to ensure a reliable, leak-free seal with standard gaskets without liner creep or extrusion.
Bond line porosity and void detection by ultrasonic testing per ASTM E2580 — ultrasonic scanning of the liner-steel interface detects any porosity, unbonded areas, or foreign inclusions that could lead to liner failure in service.

Pressure and Leak Tightness Testing for Plastic-Lined Pipe

Hydrostatic pressure test per ASME B16.5 and ASTM F1545 — the plastic-lined pipe assembly is pressurized with water to a minimum of 1.5 times the maximum allowable working pressure and held for a code-specified duration, with zero visible leakage or permanent deformation to verify the structural integrity of the steel shell and the liner.
Pneumatic pressure decay and bubble leak testing per ASTM F2095 — the lined pipe is pressurized with air or nitrogen and the pressure decay rate is measured, providing a rapid and sensitive pass/fail criterion for liner and flange seal integrity.
Helium mass spectrometer leak detection per ISO 20485 — for high-integrity plastic-lined pipe used in semiconductor and pharmaceutical applications, helium tracer gas is applied to the exterior and the leak rate is measured to confirm hermetic sealing of the liner and all joints.
Burst pressure and ultimate strength verification per customer specifications — the lined pipe is pressurized hydraulically until rupture to determine the ultimate safety margin and to verify the steel shell and liner act as a composite structure under the maximum design pressure.
Cyclic pressure fatigue testing per ASTM F1545 and customer protocols — the lined pipe is subjected to repeated pressure pulses from zero to rated pressure to simulate the start-stop and surge conditions of process operation, with post-test liner and leak verification.

Chemical Resistance and Permeation Testing in Our Plastic-Lined Pipe Testing Service

Liner immersion resistance to acids, alkalis, and solvents per ASTM D543 and ISO 175 — the plastic liner material is immersed in representative process chemicals at defined temperatures, and the change in mass, tensile strength, and visual appearance is measured to verify chemical compatibility with the intended service environment.
Permeation and blistering resistance per ASTM F1545 and NACE SP0391 — the lined pipe is exposed to a chemical solution on the liner side and the steel side is monitored for permeation, blistering, or corrosion, simulating the long-term exposure of the pipe wall to the process fluid.
Liner resistance to cleaning agents, CIP solutions, and sterilization chemicals per ISO 2812-1 — for food and pharmaceutical applications, the liner is tested with hot cleaning and disinfection solutions to verify no degradation or extractables increase occurs during sanitation cycles.
Liner extractables and leachables testing for high-purity water per USP <661> and SEMI F-57 — the plastic liner is extracted with ultrapure water and the total organic carbon, ions, and non-volatile residue are quantified to ensure the lined pipe meets semiconductor and pharmaceutical purity requirements.
Resistance to environmental stress cracking per ASTM D1693 — for polyolefin liners, the material is tested for susceptibility to stress cracking in the presence of surfactants and process chemicals, ensuring long-term liner integrity.

Thermal Cycling and High-Temperature Performance Testing for Plastic-Lined Pipe

Thermal cycling and thermal shock per ASTM F1545 and IEC 60068-2-14 — the plastic-lined pipe is rapidly cycled between the minimum and maximum rated temperatures to verify the liner and bond withstand the differential thermal expansion between the polymer and the steel shell without cracking, delamination, or loss of sealing.
Long-term thermal aging per ASTM D3045 — the lined pipe is aged at elevated temperatures and the retained liner adhesion, tensile strength, and permeation resistance are measured to predict the thermal endurance and service life.
High-temperature liner integrity and creep resistance per ASTM D2990 — the liner is subjected to sustained load at high temperature to measure creep and to verify the liner does not deform excessively or lose its protective function under continuous process heat.
Thermal conductivity and heat transfer performance per ASTM C518 — for jacketed or traced plastic-lined pipe, the thermal conductivity of the liner and the overall heat transfer are measured to support process heating and cooling design.
Low-temperature flexibility and cold impact resistance per ASTM D2137 — the lined pipe is conditioned at sub-zero temperatures and impacted to verify the liner remains flexible and does not crack in cold climates or cryogenic service.

Non-Destructive Testing and Dimensional Inspection for Plastic-Lined Pipe

Ultrasonic testing of the steel shell and liner interface per ASTM E797 — the pipe wall and liner bond are scanned for internal discontinuities, wall thickness variations, and unbonded areas that could compromise the pressure integrity of the plastic-lined pipe.
Radiographic testing of welds and fittings per ISO 17636-1 — the steel welds and flange connections are inspected for internal porosity, lack of fusion, and cracks with acceptance criteria per ASME B31.3 or customer specifications.
Liquid penetrant inspection of steel surfaces and welds per ISO 3452-1 — surface-breaking discontinuities on the steel shell and flange faces are revealed to ensure the liner is applied to a sound, defect-free substrate.
Magnetic particle inspection for ferromagnetic pipe shells per ISO 17638 — the steel pipe body and welded seams are examined for surface and near-surface defects before and after liner application.
Dimensional verification and flange alignment per ASME B16.5 and ISO 2768 — the face-to-face dimensions, flange flatness, bolt hole patterns, and bore diameter are measured to ensure correct fit-up and sealing in the piping system.
Visual inspection of liner surface and flange faces under D65 illumination — systematic examination for cracks, pinholes, discoloration, and contamination against agreed acceptance criteria and master reference samples.

Report Recognition and ISO/IEC 17025 Compliance

Every test method described in this plastic-lined pipe testing service is covered by our ISO/IEC 17025 scope of accreditation. Our technical reports and certificates of analysis are accepted by European notified bodies under the Pressure Equipment Directive, by North American chemical plant operators and engineering firms referencing ASTM and NACE standards, and by customs and procurement authorities across the Middle East, Australia, and Asia. Whether you require a complete qualification dossier for a new plastic-lined pipe product, a batch release inspection for an export shipment, or a root cause failure analysis of a liner failure or permeation issue, our laboratory provides the measurement accuracy and corrosion engineering expertise that the global chemical processing and high-purity industries demand.