Piping Flashcards
Material comparison
FRP vs HDPE
HDPE:
Smaller ID to OD
Reduces Flow
Higher installation cost for larger diameter
Because its not structurally reinforced, you’re going to have a pretty thick wall to handle higher pressures. That thicker wall will cut down on your flow properties, so you might have a 24” but in reality you’ll have an 18” pipe. So any system that is higher pressure, consider looking at fiberglass pipe.
Material Comparison - PVC vs FRP
Support Spacing
Brittle at low temperatures
low flow velocities
PVC is also good in low pressures, but with PVC you also give up a lot of support spacing. Believe it or not, PVC is actually heavier than our Red Thread product line.
Material comparison - FRP vs Steel
Internal corrosion and scaling restrict flow
Requires coating or cathodic protection
High weight
Steel is highly susceptible to corrosion, so when corrosion and weight are a problem that’s when people to look to nonmetallics. We are 1/10 the weight of carbon steel and have the same support spacing as carbon steel.
Material Comparison -
FRP
Lowest lifecycle cost
Greater ROI for most applications
No pressure loss due to corrosion
In general, if you have high temperature and high pressures, our product line really shines. Plus its corrosion resistant and light weight. So those are some good rules of thumb when you’re looking at material selection to help guide you.
Red Thread and Green Thread
Manufacturing method: Filament Wound
Size: 1” - 42”
Pressure rating: Up to 580 psi (40bar)
Resin System: Epoxy/Aromatic Amine
Max Temp: 230 deg F
Corrosion Barrier: unlined or 20 mils
Connection: Bell x Spigot
Centricast RB-2530
Manufacturing Method: Centrifugally Cast
Resin: Epoxy/Aromatic Amine
Size: 1” - 14”
Pressure Rating: 150psi
Max Temp: 250 deg. F
Corrosion Barrier: 100 mils
Connection: socket/adhesive
Centricast CL-2030
Manufacturing method: Centrifugally cast
Size: 1” -14”
Pressure Rating: 150 psi
Resin System: Vinyl Ester
Max Temp: up to 200 deg. F
Corrosion Barrier: 100 mils
Connection: Socket/Adhesive
Z-Core
Manufacturing Method: Centrifugally Cast
Size: 1”-12”
Pressure Rating: 150psi
Resin system: Proprietary Resin System (Bis F Epoxy)
Max Temp: Up to 275 deg. F.
Corrosion Barrier: 100 mils
Connection: socket
F-Chem
Manufacturing Method: Filament Wound
Size: 14”-72”
Pressure Rating: 150psi
Resin System: Custom VE (poly ester/vinyl ester)
Max Temp: up to +250 deg F.
Corrosion Barrier: up to 250 mils
Connection type: butt-wrap, bell x spigot, flanged
Silver Streak
Manufacturing Method: Filament Wound Abrasion Resistant
Size: 2” - 48”
Pressure Rating: 225psi
Resin system: Epoxy/Vinyl Ester
Max Temp: up to 225 deg. F.
Corrosion Barrier: 80 mils
Connection: Bell x Spigot, flanged
Filament Winding
This is a process where you take glass at a pre-determined angle under tension and wind it over a polished steel mandrel until you get the desired wall thickness. You’ll see the glass fibers going through a resin bath prior to being winded on the mandrel.
Centrifugal Casting
Centrifugal casting is essentially the inverse process of what we saw with filament winding. So with centrifugal casting, we’ll have a controlled OD. In this process we take glass fabric, roll it over a tube, insert it inside a polished steel mandrel, spin it, and centrifugal force pushes the glass to the outside of the inside of the pipe. We remove the mandrel, close the caster door, and inject resin. As the mandrel spins, the injected resin saturates the glass fibers and then builds a 100 mil pure resin liner or corrosion barrier.
Joining methods -
Bell and Spigot
Red thread/green thread joining method
Matched taper joint secured with adhesive
Stronger than pipe itself in both internal pressure and axial tension
Resists movement
it has an adhesive the thickness of honey or pancake syrup so you’ll have a thinner bond line compared to the socket system. As you put the joint together, you’ll get a tight squeeze of adhesive and will want to use a hydraulic come-along to help get the two tapers to lockup since they’ll want to push backout a little bit. You might also use a plastic dead-blow hammer to hit the pipe so that it vibrates and gets the tapers to lockup. Once it locks up, it really locks up. Then you’d cure it with your heat collar. The pipe will come tapered, but we also have tapering tools (think pencil sharpener) available as well.
Joining system - Socket joint
Centricast products: RB2530/CL2030
Straight adhesive joint with positive stops
Simplifies precise makeup of complex configurations
uses an adhesive the consistency of peanut butter. So imagine spreading peanut butter on the outside of the pipe, and then you have a hard stop in the coupling. You hit that hard stop or land and adhesive squeezes to the outside of the pipe, building up there instead of the inside of the pipe which could affect your flow properties. You’d then remove the excess adhesive, hit it with a hot air gun so that you create a tact-free adhesive surface, and then you would apply your heat blanket or collar and cure it. You’ll want to apply some sort of support while it cures to keep it immobile. Cure time depends on the diameter, but you’d cure it for about hour.
Joining method -
Flanged Joint
Available for all piping systems
Factory assembled or shipped loose for field assembly
