GAGEMAKER CA-9001 Посібник з експлуатації - Сторінка 6

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Coupling Alignment Gage Operation Manual

9. Roll the coupling one complete revolution and

make note of the minimum and maximum

indications.

TIP: Roll the coupling by keeping both hands on

the gage and pushing the gage down and

forward.

10. Determine the total sweep by subtracting the

minimum indication from the maximum

indication.

The total sweep of the coupling must not

exceed the maximum sweep value recorded

in the tables found in the Maximum Sweep

Value tables on page 7 & 8.

The maximum sweep values were calculated

using the following equation from API

Specification 5B Section 5.1.35.

where

R = maximum permissible sweep of the

dial gauge indicator;

E = pitch diameter of the coupling where

the contact points on the gauge are

located. This must be calculated for the

coupling being inspected;

A = maximum allowable misalignment in

20 ft. API Specification 5B Section 4.1.10

states that the maximum angular

misalignment shall not exceed ¾" per 20'

of the projected axis for all tubing and

casing sizes.

CA-9001