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STI Home Page» Products » High Pressure Gas Cylinder Flexible Pigtails

High Pressure Gas Cylinder Flexible Pigtails, Stainless Steel Braided, Polymer Inner Core Hoses

High Pressure Gas Cylinder Flexible Pigtails, Stainless Steel Braided, Polymer Inner Core Hoses
 

Smooth bore PTFE “Teflon” inner-core stainless steel flexible pigtails have been used for 4 decades in high pressure gas applications with excellent results and long service life. These hoses have been used for high pressure gases including, oxygen, inert gases, hydrogen, helium, acetylene, carbon dioxide, and gas mixes.

The physical characteristics of PTFE make it an excellent choice for use as a hose for many reasons:

  • FDA and Pharmaceutical approved
  • Wide temperature range for operation: -100 F (-73 C) to +500 F (+260 C)
  • Inherently clean, Non-contaminating, Neutral to taste, color, or odor 
  • Non-stick, resists adherence of particles or contamination by fluids
  • Steam, detergent, or caustic cleanable
  • Resistant to chemical decomposition with solvents, corrosive chemicals, and gases
  • Extremely flexible for ease of connection
  • High flow capability, low pressure drop

STI Components ¼” I.D. flexible Pigtails are manufactured in accordance with Compressed Gas Association Standard, “CGA E.9, Standard for Medium Pressure (3000 psig) Flexible PTFE- Lined Pigtails for Compressed Gas Service."

STI Components provides a ¼” I.D. Teflon PTFE flexible pigtail with the following characteristics:

  • A .040” wall thickness, which is 30% thicker than many others on the market, favorable for low permeation, resistance against kinking, and long service life
  • “Post Sintered” PTFE inner-core , substantially reducing the permeation (effusion) of gases, specify nothing less for gas service
  • Totally open flow area surrounded by smooth bore PTFE resulting in a “self-cleaning” hose to avoid the adherence and collection of particles or substances in the flow-stream
  • Nothing inside the hose to erode the PTFE material during flexing and bending during connection cycles, for the longest service life
  • Wide range of end fitting choices for every industry application, including a brass DVP* end for oxygen service
  • Strong end fitting design, controlled radial crimp, and stainless steel collars for maximum strength
  • 100% pressure tested, with cleaning, capping, and bagging for oxygen service

With the thicker wall and post sintered PTFE inner-core, this hose is the choice of most companies for cylinder filling applications requiring low pressure drop for full flow at a high rate, and many cylinder discharge applications as well.

STI Components also provides a ¼” I.D. ETFE “Tefzel” inner-core flexible pigtail with a permeation rate 77% lower than PTFE , specifically for use in hydrogen and helium gas service.

Safety Notes:

  • ETFE is not recommended for oxygen service.
  • For hydrogen or helium cylinder gas supply manifolds or hospital oxygen reserve banks, STI recommends a zero-permeation pigtail, see our Stainless Steel Innercore hose.
  • *The brass DVP end fitting, is recommended as a “distance volume piece” for maximum protection against adiabatic compression effect in oxygen service per CGA E.9, proven for safe use of PTFE in oxygen service.
Click here to see High Pressure Hose End Fitting Styles for available end configurations and end fitting part numbers
 

Optional- Armor Casing – Strong Stainless Steel Interlock

  • Highly recommended for applications where the flexible pigtails are handled frequently
  • Protection against braid wire damage and kink-resistance
  • Smooth, clean, easy to handle protective cover of armor over the hose
  • Greatly extends service life
 Flexible Pigtail Hose Specifications for Industrial Gases Filling Manifolds, Smooth Bore Polymer Innercore

HOSE STYLE

SIZE
ID
(IN)

SIZE
OD
W/O
ARMOR
(IN)

SIZE
OD
W/
ARMOR
(IN)

INNER CORE WALL THICK

MAWP
 (PSIG)

MIN
BURST PRESS.
 (PSIG)

MIN
BEND RADIUS
W/O
ARMOR
(IN)

MIN
BEND RADIUS W/
ARMOR (IN)

WT/FT
W/O
ARMOR
(LBS)

WT/FT W/ARMOR (LBS)

TEMP
RANGE
(°F)

CONDUCTIVE (YES/NO)

4TS

0.250

0.375

0.560

0.040

3000

13500

1.5

2.7

0.08

0.26

-100 to 450

no

 4TD

0.250

0.400

0.625

0.040

4500

18000

1.5

2.7

0.10

0.26

-100 to 450

no

4TH

0.220

0.390

0.625

0.040

5000

20000

1.6

2.7

0.10

0.26

-100 to 450

yes

4TX

0.220

0.500

0.725

0.040

6000

24600

1.6

2.7

0.24

0.40

-100 to 450

yes

4TZ

0.250

0.375

0.560

0.030

3000

13500

1.5

2.7

0.08

0.22

-100 to 250

no

4TZD

0.250

0.400

0.625

0.030

4500

18000

1.5

2.7

0.10

0.26

-100 to 250

no

 
Based on the end fitting material, these hoses are rated at MAWP as follows:
HOSE STYLE
DESCRIPTION
MAXIMUM WORKING PRESSURE
4TS PTFE Inner-core, Single Braided, Brass ends 3000 psig
4TD PTFE Inner-core, Double Braided, Brass ends Brass ends: 3600 psig
316L SS ends: 4500 psig
4TH PTFE Conductive Inner-core, Heavy Braid, 316L SS Ends 5000 psig
4TX PTFE Conductive Inner-core, Double Braided, Spiral wrap, 316L SS Ends 6000 psig
4TZS ETFE (Tefzel) Inner-core, Single Braided, Brass ends 3000 psig
4TZD ETFE (Tefzel) Inner-core, Double Braided Brass ends: 3600 psig
316L SS ends: 4500 psig
 
LIST OF COMMON GASES and CGA CYLINDER VALVE CONNECTIONS
From Compressed Gas Association’s pamphlet V-1 “Compressed Gas Cylinder Valve Outlet and Inlet Connections”
GAS CGA (0-3000 PSI) CGA (3001-5500 PSI) CGA (5501-7500 PSI) CGA (HIGH INTEGRITY)
Air 346/590 347 702  
Argon 580 680 677 677
Carbon Dioxide 320 716    
Carbon Monoxide 350 724    
Ethane 350      
Ethylene 350      
Helium 580 680 677 718
Hydrogen 350 695 703 724
LPG 510      
Methane 350 695 703  
Nitrogen 580 680 677 718
Nitrous Oxide 326      
Oxygen 540      
Sulfur Hexafluoride 590      
Inert Welding Mixture 580 680 677  
Flammable Mixtures 350      
Medical Mixtures 280 296 500 580
 

 

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