Ethylene

Lined Pipe / Fittings Overview

Founded in 1950, Ethylene’s roots trace back to DuPont® and the pioneering development of PTFE lined products.

In 1958, Ethylene was the first company to employ PTFE Isostatic Molding processes and also the first company to process pure unmodified PTFE for its lined piping products. Competitors followed some three decades later.

Today, Ethylene processes Fluoropolymers in more ways than any other company. Processes include: Dry & Wet Isostatic Molding, Paste Extrusion, Ram Extrusion, Rotolining, Injection Molding, Intrusion Molding, Melt Extrusion, Resin Transfer Molding, Compression Molding and Vacuum Forming.

ChemTite PTFE Lined Pipe

Pipe sections are lined with a heavy-walled isostatically molded PTFE liner with the following minimum PTFE wall thickness.

Minimum PTFE Wall Thickness
All sizes in inches.
Nominal Size (in.)	Liner Thickness (in.)	Maximum Length (in.)
1	.130	240
1 1/2	.150	240
2	.160	240
3	.160	240
4	.180	240
6	.280	240
8	.310	240
10	.350	240
12	.450	240
14	.250	120
16	.250	120
18	.275	120
20	.350	120
24	.350	120
30	.365	108
36	.375	108
42	.975	60

Typical Properties of DuPont Fluoroplastics
	PTFE	PFA	ETFE
Melting Point, °F	621	580	520
Upper Service Temp., °F	500	500	300-350
Tensile Strength, at RT psi	2,500-4,000	4,500	6,500
Ultimate Elongation, % at RT	225-450	300	100-300
% at 482°F	350	500
Flexural Modulus, 103 psi at RT	40-90	100	200
103 psi at 482°F	4	10
Coefficient of Friction	.02-.26	.23-.29	.40
Chemical Resistance	Outstanding	Outstanding	Excellent
Cryogenic Service	Outstanding	Outstanding	Outstanding
	F   F   F   F     |   |   |   |   ~ C - C - C - C ~   |   |   |   |     F   F   F   F	F   F   F   F   F   F     |   |   |   |   |   |   ~ C - C - C - C - C - C ~   |   |   |   |   |   |     F   F   F   O | R1   F   F	F   F   H   H   F   F     |   |   |   |   |   |   ~ C - C - C - C - C - C ~   |   |   |   |   |   |     F   F   F   H   F   F

Lined Piped / Fittings Styles

Download our ChemTite Lined Piping Brochure for Fitting Dimensions and Specs

• 

  90° Elbow

• 

  45° Elbow

• 

  Tee

• 

  Reducing Tee

• 

  Cross

• 

  Lateral

• 

  Short Stack Tee

• 

  Short Stack Cross

• 

  Concentric Reducer

• 

  Eccentric Reducer

• 

  1" Branch Tee

• 

  1.5" Branch Tee

• 

  2" Branch Tee

• 

  Blind Flange

• 

  Spectacle Blind Flange

• 

  Straight Reducing Flange

• 

  Tapered Reducing Flange

FLO-CHECK™ PFA lined ball check valve.

Eliminate Back-Flow

Flo-Check™ PFA lined ball check valves prevent the back-flow of liquids in pipelines, prevent siphoning of pumps and eliminates pump impeller rotation in opposite direction due to back-flowing media. Flo-Check’s PFA lining provides the ultimate in chemical and permeation resistance from (-)20°F to (+)350°F and all sizes are full vacuum rated.

Flo-Check™ is resistant to:

• All acids
• All solvents
• All organic and inorganic chlorides & sulfates
• All bleach solutions
• All phenols
• All caustics
• All peroxides

Dimensions

Dimensions
Size	(A) Length	(B) Diameter	(C) Flare Diameter
1"	6"	5-1/2"	2"
1-1/2"	7"	6-1/2"	2-1/2"
2"	8"	7-5/16"	3-1/8"
3"	9-1/2"	9-7/8"	5-1/8"
4"	11-1/2"	11-1/4"	6-5/16"
6"	14"	15-1/2"	8"

Parts & Material

Item	Qty	Description	Material
Not recommended for horizontal installations
1	2	Check Valve Body	ASTM A395 DCI
2	1	Liner	PFA
3	4-8	Threaded Stud, Grade B7	Zinc Plated Steel
4	1	Check Valve Ball	Virgin PTFE
5	8-16	Heavy Hex Nut, Grade 2H	Zinc Plated Steel
6	1	Ethylene Nameplate	304 S.S.

Pressure-Temperature