Product Description
Pancake coils are of much shorter length than level wound coils and are typically used in the installation of air conditioning and refrigeration systems. They are also used in OEM end uses where suitable equipment is not available for handling level wound coils. Pancake coils are provided in a flat coil which are two layers thick. Bunch coils are similar to pancake coils, but all of the individual loops have the same diameter much like a coil of wire.
Pancake and Bunch Coils – Produced in the following outside diameter size ranges.
Min. Diameter – 3/16″ (4.76 mm)
Max. Diameter – 1-1/8″ (28.58 mm)
Lengths: Standard available lengths are 50, 60 and 100 feet.
Packaging – pancake coils are available in individual corrugated packages stacked on a wooden skid and stretch wrapped. They are also available with multiple coils packed in a corrugated cardboard box with paper interleave between coils.
Testing – all coils are eddy current tested in accordance with ASTM specification E243. All coils are provided with no detectable defects.
Cleanliness – all annealed coils meet or exceed the cleanliness levels specified in ASTM B280. Coils are capped with plastic end caps when specified by the customer.
Tolerances – tube in pancake or bunch coils are produced to the applicable specifications of ASTM B68.
Tempers – bunch or annealed coils are provided in light anneal or soft anneal.
Light Anneal (050) – .015 – .040 mm grain – preferred for tight bends and extreme forming applications. This is an annealed temper with a fine grain size to prevent “orange peel” and fracturing when forming.
Soft Anneal (060) – .040 – .060 mm grain – this temper is suitable for general purpose bending and forming which is not as extreme as that requiring light annealed temper. Soft anneal temper work hardens at a slower rate than light anneal.