Recommended Hot Oil System Components

Technical Data

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Pipe—Flanged Installations
ASTM A-106 Grade B schedule 40 seamless carbon steel pipe up through 1 1/2” diameter.
ASTM A-53 Grade B schedule 40 seamless carbon steel pipe for 2” and greater diameter.
Materials and methods should minimize weld spatter and slag. Pipe should be free of mill scale, welding flux, quench oils and lacquers before assembling.

Flanges/Fittings
ASTM A-181 1/16” raised face 300 lb rating up to 4” pipe diameter; 150 lb rating greater than 4” pipe diameter.

Flange Gaskets
Flexible graphite. (Grafoil™, Garlock™ or equal).
Expanded/filled PTFE below 450°F/232°C (Goretex™, Garlock™ or equal).

Bolts
ASTM A-193 Grade B7.

Nuts
ASTM A-194 Grade 2H.

Pipe–Threaded Installations
ASTM A-106 Grade B schedule 80 carbon steel pipe up to 1” diameter.
ASTM A-106 Grade B schedule 40 carbon steel pipe from 1” to 2” diameter.
ASTM A-53 Grade B schedule 40 carbon steel pipe greater than 2” diameter.
Use high temperature thread sealant for all connections (LA-CO or equivalent). Back welding all connections is suggested.

Valves
Globe valves with bellows seals (ARI or equivalent).

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Pumps—Centrifugal
Dean (RA2000/3000 series), Dickow (NKL series), MP (HTO series) or SIHI (ZTN series).

Pumps—Positive Displacement
Viking (internal gear only).

Mechanical Seals
To 400°F (204°C): carbon vs ni resist.
Above 400°F (204°C): carbon vs tungsten carbide or carbon vs silicon carbide.

Pump Packing: End (non-extrusion) rings of braided carbon yarn (Palmetto™#1585, Garlock™ #98 or equal), center (sealing) rings of die-formed graphite (Grafoil™, Palfoil™ or equal).

O-Rings/Seals
To 400°F/204°C: fluoroelastomer (VitonTM or equal)

Above 400°F/204°C: perfluoroelastomer (ChemrazTM, ZalakTM, KalrezTM or equal).

Insulation
Closed cell (Pittsburgh Corning foamed glass) is recommended for all installations. Mineral Fiber* or Calcium Silicate* can be substituted where potential for leaks is low.

*NOTE: These materials
should not be used within 2’
of potential leak points such as valves,
pipe taps and flanges. Use closed
cel material for these areas.

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Note: The information and recommendations in this literature are made in good faith and are believed to be correct as of the below date. You, the user or specifier, should independently determine the suitability and fitness of Paratherm heat transfer fluids for use in your specific application. We warrant that the fluids conform to the specifications in Paratherm literature. Because our assistance is furnished without charge, and because we have no control over the fluid's end use or the conditions under which it will be used, we make no other warranties-expressed or implied, including the warranties of merchantability or fitness for a particular use or purpose (recommendations in this bulletin are not intended nor should be construed as approval to infringe on any existing patent). The user's exclusive remedy, and Paratherm's sole liability is limited to refund of the purchase price or replacement of any product proven to be otherwise than as warranted. Paratherm Corporation will not be liable for incidental or consequential damages of any kind. Some product names of companies found in Paratherm literature are registered trademarks. This statement is in lieu of individually noting each.

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