Fig. 31 Flexible Metal Hose
Flexible metal hose is a length of tubing made flexible by means of convolutions. It may be readily bent and yet remain gas and liquid tight.
Swagelok flexible metal hose can be used for many applications such as reduction of piping stresses, compensation for misalignment, thermal expansion and contraction, vibration absorption, noise control, and flexible connection for reciprocating motions. Swagelok flexible metal hose is made of 316L heavy wall stainless steel tube with 321 stainless steel braid. Many Swagelok components can be welded to the end of the hose. End connections include Swagelok tube fitting, tube adapter, VCO, VCR, and NPT. Temperatures range from cryogenic to 1000°F (537°C) and pressure ratings are to 3100 psig (213 bar).
TFE Lined Hose
This metal braided hose, lined with TFE, is used where an extremely smooth, corrosion resistant interior is required. Swagelok TFE lined hose consists of a TFE core tube, 304 stainless steel braid, and 316 stainless steel end connections. TFE is inert to almost all commercial chemicals, acids, alcohols, solvents, and many other system fluids. It works well in temperatures from cryogenics up to 450°F (230°C). It is not affected by continuous flexing, vibration, or impulse, and it withstands temperature cycling. It does not absorb either hot or cold moisture and, therefore, can be used in steam applications to 250 psig (17.2 bar). TFE hose has maintained a 0.040 maximum wall thickness to help resist permeation, kinking, and abrasion. The smooth core tube is also available in carbon filled TFE if the possibility of static electric discharge exists. End connections include Swagelok tube fitting, tube adapter, NPT, VCO, male AN, sanitary flange, and JIC 37° AN Swivel.
Push-On Hose
Swagelok Push-On Hose is designed to take advantage of a fast, low cost method of assembling low pressure lines on the job site. Hose lines can be installed in seconds. Push-on hose eliminates the need for clamps, bands, or tools when assembling. Due to its Buna-N cover and core tube, the hose can be used in a wide variety of applications including air, water, oil, grease, and many solvents. When assembling the hose and the end connection, it is only necessary to push the barbed end into the hose until completely bottomed. The end connection may be reused by simply cutting and removing the hose.
Tube adapter and male NPT and BSP/ISO tapered end connections are available in brass and 316 stainless steel. Pressures are to 350 psig (24 bar) and temperatures are to 200°F (93°C).
Thermoplastic Hose
Swagelok offers several different varieties of thermoplastic hoses to meet a wide range of services and applications. Hoses are available with Swagelok tube fitting, tube adapter, NPT, JIC 37° AN Swivel, and BSP/ISO parallel and tapered thread end connections.
Thermoplastic Hose for Industrial Fluid Applications (7R/8R) Swagelok thermoplastic hose is designed to handle a wide range of industrial fluids. The use of thermoplastic materials for the tube, reinforcement, and cover ensures performance capabilities beyond conventional wire-reinforced rubber hose. The Nylon 11 core tube is free of manufacturing soapstone or grit and is compatible with most chemicals, solvents, hydraulic oils, and synthetic fluids. The synthetic fiber reinforcement, unlike wire reinforcement, resists fatigue caused by flexing and rugged handling. Swagelok thermoplastic hose is also 60 % lighter in weight than conventional rubber hoses with wire reinforcement. The rugged polyurethane cover provides for abrasion resistance and longer service life over comparable rubber hose. Unlike rubber hose which cures on the shelf, thermoplastic hose has an unlimited shelf life and is resistant to UV light and ozone. The 7R hose is available in pressures to 2750 psig (190 bar), and the 8R hose is available in pressures to 5000 psig (345 bar). Both hoses can be used in continuous service to temperatures of 200°F (93°C).
Thermoplastic Hose for High Purity Service (7P)
Swagelok poly-pure hose is designed with a polyethylene core material that is in compliance with FDA regulations and NSF standards for contact with water, food, and beverage. Applications include drinking water, potable water, deionized water, washdown lines in food service, water filtration, and food filling lines. The light blue, non-perforated polyurethane outer cover protects against abrasion, cuts, cracks, and exposure to UV light and ozone. Swagelok poly-pure hose should not be used in gas service due to its non-perforated cover. This hose can be used in temperatures to 150°F (65°C) and pressures to 2750 psig (190 bar).
Thermoplastic Hose for Electrical Isolation (7N)
Swagelok non-conductive thermoplastic hose has been designed with a non-perforated cover to prevent moisture from entering the hose and affecting its overall conductivity. Applications for this hose include areas where there is a need for electrical isolation of instrumentation, equipment, or an operator. The hydraulic tool and mobile equipment are two of the major uses for the 7N hose. An orange polyurethane cover protects the hose from abrasion and identifies the hose as non-conductive. This hose is pressure rated to 2750 psig (190 bar).
Swagelok 7N hose should be used for liquid service only.
Thermoplastic Hose (with Conductive Core Tube) for Natural Gas Service (CCNG)
Swagelok conductive compressed natural gas hose is designed to maintain electrical continuity during use. Applications include places where the conductive core tube needs to transmit all electrical charge along the hose to a ground instead of to equipment or operators. Also, in applications such as fill stations for natural gas vehicles (NGV), where an electrically charged build-up could result in a spark, the Swagelok CCNG hose will eliminate the static electric build-up. Hose is pressure rated to 5000 psig (345 bar).