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Flanged Plastic-Lined Pipe | CONQUEST® Plastic-Lined Pipe | MULTI-AXIS® | Plastic-Lined Fittings | Valves | Special Shapes | Dip Pipes, Spargers, Mixing Tees | Sight Indicators | Expansion Joints | Large Diameter | High Integrity Flange (HIF)
  Flanged Plastic-Lined Pipe

Resistoflex plastic lined pipe is made with a locked-in liner to minimize the adverse affects of differential thermal expansion between the liner and the steel. Both processes used are exclusive to Resistoflex.

THERMALOK® Pipe - annealing process relieves stress in the liner while expanding the liner within the steel housing.
  • Unlimited housing material options
  • More flexibility in flange options.
  • Sizes ranging from 1"-24" diameter
Swaged Pipe - Specialty steel tubing is mechanically reduced around the plastic liner.
  • Used exclusively for CONQUEST® and MULTI-AXIS®
  • Sizes ranging from 1" - 8"
  • Threaded flanges and rotatable flange assemblies only
  Plastic-Lined Fittings

Resistoflex manufactures thousands of different shaped plastic lined fittings according to ANSI dimensions. PP, PVDF, and PFA fittings are all injection or transfer molded Tefzel® lined fittings and special shapes are roto-lined in custom housings. PTFE liners are made by isostatic molding. Fittings are generally differentiated by their metallurgies.

Ductile Iron - Economical Class 150 fittings with fixed flanges for PP and PVDF liners, and certain PTFE fittings.

Cast Steel - High strength Class 150 or Class 300 ratings for PP, PVDF and PFA liners. Flanges are fixed.

Fabricated Steel - High performance Class 150 or Class 300 fittings with rotatable flanges used with PTFE liners. Can be made to DIN or JIS flange dimension. Can also be fabricated using stainless steel or exotic alloys.

CONQUEST® Fittings - Patented flangeless fittings designed for use with CONQUEST® couplings.

  CONQUEST® Connections

CONQUEST® Pipe is designed to minimize the number of flanged connections in the process line. CONQUEST® is made from swaged pipe and is available in 1" - 4" for all liner types. Three different technologies make up the CONQUEST® family:

MULTI-AXIS® - Precision bent piping custom made per customer drawing.
  • Up to 4 compound bends (3D) in a single piece for dramatic joint reduction
  • Fewer bolts means faster installation
  • Trickier handling
  • Design assistance available from Resistoflex Engineering Support Service
CONQUEST® - Patented flangeless joint design with performance of a welded system.
  • Welded liners provide primary seal
  • Special Lokring couplings provide weld like performance on the steel
  • Zero maintenance requirement
  • No monitoring per US Clean Air Act regulations
  • Field pipe routing capability
EXTRA-LONGS - Lengths available up to 40' (12m)
  • Available from the factory in PTFE, PP and PVDF
  • Time, money, and joint savings ideal for transfer lines
  • Can be pre-assembled at factory using CONQUEST® couplings for PFA (1" - 2").

Resistoflex manufactures four different types of valves for corrosive services. The diaphragm and clamp valves provide throttling capabilities, and vertical and horizontal checks prevent backflow in process lines.

Diaphragm Valve
  • Ductile Iron or Cast Steel Body
  • Liner Options and Size availability: PP (1" - 8"), PVDF (1" - 8"), PFA (1" - 4")
  • Diaphragm materials: PTFE, Viton®* fluoroelastomer, Hypalon®*, or EPDM
Horizontal & Vertical Check Valve
  • Sliding Poppet
  • Vertical - PP (1" - 8"), PVDF (1" - 8"), PFA (1" - 4")
  • Horizontal - PP (1" - 8"), PVDF (1" - 6"), PFA (1" - 4")
  • 0.5 psi poppet unseating pressure
PTFE Clamp Valve
  • 1" - 8" PTFE-lined
  • Ductile Iron Body
  • Packless Design
  • Full-Flow
  • Bubble tight
  • Linear Actuation Option

*Hypalon® and Viton® fluoroelastomer are registered trademarks of DuPont Performance Elastomers.

  Special Shapes

Fabricated and rotationally lined custom fittings and small vessels. Lined with TEFZEL® ETFE, these custom products are available through 24" dia., with ANSI or custom dimensions. Contract lining and manufacturing services are available for pump, valve, and flowmeter OEM's.
  Sight Flow Indicators

Resistoflex PTFE-Lined Bull's Eye sight flow indicators are used to observe the fluid and flow characteristics of process fluids. Sight flows can be optionally equipped with drip lips and/or flutter flow indicators. These products are available in 1" - 6" from Resistoflex USA and in 8" - 16" diameter as manufactured by Resistoflex.

  Reaction Vessel Components

Resistoflex manufactures dip pipes, for loading, unloading and decanting fluids in vessels and reactors, and spargers, used to inject steam or other vapors, and other specialty components like nozzle liners and thermowell baffles.

Reinforced Dip Pipes - Available in steel lined and jacketed in PTFE designed for agitated vessels, and in solid PTFE for nonagitated vessels.

Reinforced Spargers - Available in steel lined and jacketed in PTFE designed to resist fatigue, and in solid PTFE for extremely corrosive applications.

Solid PTFE Dip Pipes and Spargers - Available in steel lined and jacketed in PTFE designed to resist fatigue, and in solid PTFE for extremely corrosive applications.

Mixing Tee Nozzles - Solid PTFE mixing tee nozzles disperse acid uniformly into acid mixing tees.

Nozzle Liner - Designed to protect fragile glass linings of reactors without compromising corrosion resistance.

Thermowell Baffles - Specialty component for inserting thermocouples in corrosive fluids.
  PTFE Expansion Joints

Resistoflex expansion joints are made of contour molded PTFE, providing exceptional corrosion resistance and flex-life. The flexible liner is molded over the metallic sealing face. Different numbers of convolutions accommodate varying degrees of misalignment, axial travel, and angular deflection between components.

2 Convolutions - for minor movement between components
  • Available 1" - 12"
  • Least movement 1/4"- 1/2"
  • Least Misalignment 1/8" - 1/4"
  • Highest Pressure Ratings
  • Full Vacuum Rated
3 Convolutions - for moderate movement or misalignment
  • Available 1" - 8"
  • Moderate Movement 1/2"- 1-1/8"
  • Moderate Misalignment 1/4" - 9/16"
  • Moderate Pressure Ratings
  • Full Vacuum Rated
5 Convolutions - for the most deflection, misalignment and axial travel
  • Available 1" - 6"
  • Highest Movement 1/2"- 1-1/4"
  • Highest Misalignment 1/2" - 5/8"
  • Lowest Pressure Ratings
  • Not Vacuum Rated
Stainless Steel Armoured PTFE Expansion Joint

  Large Diameter Resistoflex 14" - 24" PTFE-Lined Pipe, Fittings and Expansion Joints
  • Pipe spools with fixed or rotating flanges (all seamless liner)
  • Elbows in 90, 45, 30, and 60 degree bends
  • Tees, reducing tees and instrument tees
  • Concentric and eccentric reducers
  • Optional full-vacuum capability in 14" - 18"sizes
  High Integrity Flange (HIF)

HIF is a family of special flanges and fittings designed to improve the performance of plastic-lined pipe joints. The main "working" component of HIF, the Belleville Washer(s), maintains optimum sealing pressure at the PTFE flare faces, independent of the bolt torque. The load bearing ring, providing a metal-to-metal seal at the pipe flare, eliminates the possibility of mechanical damage to the PTFE flares due to over-torquing. After installation, the system is maintenance free. The metal-to-metal seal provided by the loading bearing ring contains the conveyed media in the event of a fire. HIF has been tested and is a Factory Mutual approved PTFE lined pipe system.

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