FAQ

Mechanical Test Plugs
FAQs
Q Does Cherne offer chemical resistant mechanical test plugs?
A Yes. Cherne offers two chemical resistant mechanical plugs: The Cherne Well Monitor Plug and the
Cherne Petro Econ-O–Grip.
Q What is the maximum temperature that the original gripper plugs be exposed to?
A Gripper plugs have natural rubber O-Rings. These O-Rings allow for operating temperatures between 0°
F to 125° F. Consult engineering for usage outside this temperature range.
Q What gripper should be used when permanently blocking a hole?
A Mechanical plugs can be used to permanently block an opening (Grippers are mechanical plugs). Be sure
to use the correct size Gripper for the opening.
Q Does Cherne offer a ow-through plugs?
A Yes. Cherne offers the T-Handle Gripper as a ow through plug.
Q What is the denition of deection?
A Deection is dened as the “out of roundness” of plastic pipe after being covered with backll (stone,
sand, dirt, etc.).
Q What is “Base Inside Diameter”?
A “Base Inside Diameter” is average inside diameter less manufacturing tolerances for out of roundness
and wall thickness. The ASTM uses base ID to calculate deection allowances.
Q What pipe sizes are covered by D3034?
A 4" to 15"