Burst-testing of refractory metal tubing is conducted in an apparatus in which tubular specimans are firmly gripped and test pressures and temperatures are applied. Porosity, flaw, and fatigue-stress rupture are also tested

Gyorgak, C. A.

English

NASA Technical Reports Server

May 1965
	
Brief 65-10131 
NASA TECH BRIEF 
NASA Tech Briefs are issued by the Technology Utilization Division to summarize specific 
technical innovations derived from the space program. Copies are available to the public from 
the Clearinghouse for Federal Scientific and Technical information, Springfield, Virginia, 22151. 	 - 
Apparatus Facilitates Pressure-Testing of Metal Tubing 
Cooling Water 
Cooling Water	 Outlet 
Outlet
Fixture-Cooling	 t 
Thermocouple and Chamber 
Pressure Gage 
/Brazed Joint
Pressure Inlet 
Refractory Metal Tube 
Under Pressure Test 
Cooling Water	 I 
Inlet	 Cooling Water 
Inlet 
The problem: Burst-testing of refractory metal tub 
ing at pressures of up to 3000 psig and temperatures 
ranging from room temperature to above 50000F. 
The solution: An apparatus in which tubular speci-
mens are firmly gripped and which provides for appli-
cation of test pressures and temperatures. 
How it's done: The apparatus consists of two 
water-cooled fixtures into which the two ends of the 
tubular specimen to be tested are brazed. Thermo-
couples and a pressure gage are fitted to one end of the 
apparatus, and pressure (from a nitrogen bottle) is 
supplied to the specimen through the other end of the 
apparatus. For tests at elevated temperatures, the tub-
ing is heated by rf induction coils. In carrying out a 
test, the tubing is brought to the desired temperature 
and the pressure is increased at a predetermined rate 
until failure occurs.
Notes: 
1. This apparatus can also be used for testing refrac-
tory metal tubing for porosity, flaws, and fatigue-
stress rupture. 
2. Inquiries concerning this innovation may be di-
rected to: 
Technology Utilization Officer 
Lewis Research Center 
21000 Brookpark Road 
Cleveland, Ohio, 44135 
Reference: B65-10131 
Patent status: NASA encourages commercial use
of this innovation. No patent action is contemplated. 
Source: C. A. Gyorgak
(Lewis- 174) 
Category No. 05 
This document was prepared under the sponsorship of the National 
Aeronautics and Space Administration. Neither the United States Govern-
ment, nor NASA, nor any person acting on behalf of NASA: A. Makes 
any warranty or representation, express or implied, with respect to the 
accuracy, completeness, or usefulness of the information contained in
this document, or that the use of any information, apparatus, method, 
or process disclosed in this document may not infringe privately-owned 
rights; or B. Assumes any liabilities with respect to the use of, or for 
damages resulting from the use of, any information, apparatus, method, 
or process disclosed in this document.
https://ntrs.nasa.gov/search.jsp?R=19650000130 2020-03-11T17:22:46+00:00Z


Apparatus facilitates pressure-testing of metal tubing

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