Method for testing integrity of welds at elevated temperatures

Details Method for testing integrity of welds at elevated temperatures Method for testing integrity of welds at elevated temperatures

Filed on

1985-06-19

Date issued

1986-06-24

Examiner

Levy, Stewart J.

Patent Class

Measuring and testing

SubClass

With fluid pressure

SubSubClass

Leakage

Other Related Categories

G01M 322

Type

Patent

Status

active

Patent number

045961352

Description

ABSTRACT:
In a method for testing the integrity of welds at elevated temperatures, a pressurized gas mixture is injected in an area between the inner and outer weld of a terminal flange welded to a tubular pipe section or casing. The pressurized gas mixture includes a marker gas which is detected by a detection apparatus which scans the weld. The pressure of the gas mixture is also monitored to observe losses in pressure indicative of flaws in the welds. The integrity of the welds is tested at elevated temperature permitting remedial repairs to be made without reheating the tubular pipe or casing.

REFERENCES:
patent: 4513605 (1985-04-01), Hawerkamp

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