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Pureflex® BlueLine™ Flexible Couplings, Expansion Joints and Bellows

Pureflex® BlueLine™ flexible couplings, expansion joints and bellows are specifically designed to compensate for pipe expansion, vibration and misalignment in process piping and vessels. All BlueLine™ flexible couplings, expansion joints and bellows are constructed from uniform walled isostatically molded PTFE and demonstrate a high level of design consistency throughout the product line. This consistency-not apparent in competitive products-is a result of an optimally designed convolution and a proprietary manufacturing process.

BlueLine™ flexible couplings, expansion joints and bellows offer a wide variety of benefits for maintenance and repair personnel including:

  • Reliable protection for fragile FRP, carbon or glass equipment and nozzles
  • Superior corrosion resistance in acidic and caustic environments
  • Heavy walls made from isostatically molded virgin PTFE
  • Low spring rates with short face-to-face dimensions
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blueline PTFE expansion join

Flexible Couplings

Pureflex® BlueLine™ flexible couplings are two convolution connectors, available from 1” to 12” in diameter, that compensate for minor movement and are ideal for use in piping systems as vibration and sound insulators.

Flexible Couplings (2 Convolutions)

Nom.
Size
Neutral
Length
A
Maximum
Travel
+ or -
Flare
Diameter
B
Maximum
Misalignment
Weight
Lbs.
1"1-5/16"1/4"2"1/8"2.6
1-1/2"1-1/2"1/4"2-7/8"1/8"3.9
2"1-7/8"1/4"3 5/8"1/8"7.8
2-1/2"1-15/16"5/16"4-1/8"1/8"10.8
3"2-7/16"3/8"5"3/16"13.1
4"2-5/8"1/2"6-3/16"1/4"18.2
5"3-1/16"11/16"7-5/16"1/4"22.4
6"2-13/16"1/2"8-1/2"1/4"27.7
8"3-11/16"13/16"10-5/8"1/4"41.0
10"4"1"12-3/4"1/4"60.1
12"4-1/8"1"15"1/4"89.7

Maximum Operating Pressure vs.Temperature (2 Convolutions)

Maximum Operating Pressure versus Temperature
blueline PTFE 2 convolutions

Expansion Joints

Pureflex® BlueLine™ expansion joints are three convolution connectors, available from 1" to 12" in diameter, that compensate for moderate movement or misalignment, have increased flexibility, and can easily be installed in piping systems.

Expansion Joints (3 Convolutions)

Nom.
Size
Neutral
Length
A
Maximum
Travel
+ or -
Flare
Diameter
B
Maximum
Misalignment
Weight
Lbs.
1"1-13/16"1/2"2"1/4"2.7
1-1/2"2"1/2"2-7/8"1/4"4.1
2"2-3/4"3/4"3-5/8"3/8"8.1
2-1/2"3"1"4-1/8"3/8"11.2
3"3-5/8"1"5"1/2"13.6
4"3-3/4"1-1/8"6-3/16"1/2"18.9
5"4"1-1/8"7-5/16"1/2"23.4
6"4"1-1/8"8-1/2"5/8"29.1
8"5-7/16"1-11/16"10-5/8"5/8"43.0

Maximum Operating Pressure vs.Temperature (3 Convolutions)

Maximum Operating Pressure vs Temperature
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blueline PTFE 3 convolutions

Bellows

Pureflex® BlueLine™ bellows are five convolution connectors, available from 1” to 12” in diameter, that compensate for extensive movement, misalignment, and axial travel, have maximum flexibility and are ideal for use in weigh tank applications.

Bellows

Nom.
Size
Neutral
Length
A
Maximum
Travel
+ or -
Flare
Diameter
B
Maximum
Misalignment
Weight
Lbs.
1"2-11/16"13/16"2"1/2"2.9
1-1/2"3-3/16"1-1/16"2-7/8"1/2"4.3
2"3-15/16"1-1/16"3-5/8"1/2"8.7
3"4-15/16"1-1/16"5"1/2"14.8
4"5-3/16"1-5/16"6-3/16"5/8"20.4
6"5-11/16"1-9/16"8-1/2"5/8"31.8

Maximum Operating Pressure vs.Temperature (5 Convolutions)

Maximum Operating Pressure versus Temperature
blueline PTFE 5 convolutions
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This resource is intended as a guideline to be used with all available information to determine suitability of material selection. We suggest thorough research which should include known applications when determining material. The information contained herein is provided only as a guide for the use of ANDRONACO INDUSTRIES products.

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