Gas tightness of equipment for gas welding and allied processes

2019 ◽  
Keyword(s):  
Gas Tightness

The effect of gas tightness of the regenerator system in glass furnaces on their efficiency

1958 ◽  
Vol 15 (10) ◽  
pp. 546-548
Author(s):  
V. A. Krechmar ◽  
M. G. Stepanenko
Keyword(s):  
Glass Furnaces ◽  
Regenerator System ◽  
Gas Tightness

Structural features and gas tightness of EB-PVD 1Ce10ScSZ electrolyte films

2012 ◽  
Vol 30 (3) ◽  
pp. 170-179 ◽  
Author(s):  
M. Andrzejczuk ◽  
O. Vasylyev ◽  
M. Brychevskyi ◽  
L. Dubykivskyi ◽  
A. Smirnova ◽  
...  
Keyword(s):  
Structural Features ◽  
Gas Tightness

Friction Stir Welding of Aluminum Metal Matrix Composite Containers for Electric Components

2014 ◽  
Vol 611-612 ◽  
pp. 1445-1451 ◽  
Author(s):  
Jukka Pakkanen ◽  
Andreas Huetter ◽  
Cecilia Poletti ◽  
Norbert Enzinger ◽  
Christof Sommitsch ◽  
...  
Keyword(s):  
Thermal Expansion ◽  
Friction Stir Welding ◽  
Metal Matrix Composite ◽  
Matrix Composite ◽  
Metal Matrix ◽  
Base Material ◽  
Stir Zone ◽  
Friction Stir ◽  
Joint Geometry ◽  
Gas Tightness

For aerospace applications, light-weight boxes to protect and carry electronic equipment need to be sealed. The main requirements on the components are low thermal expansion and gas tightness. The common material for such an application is a metal matrix composite (MMC). The MMC suggested here consists of A356 aluminum alloy matrix with 15 vol.% SiC particle reinforcement. A safe limit for the electronic component inside the boxes during sealing is determined to be 180°C. Due to the boundary conditions gas tightness and low heat input, Friction Stir Welding (FSW) might be an alternative to the employed joining techniques. For the FSW process the T-Joint is the most appropriate joint geometry in respect to the box design. The geometry of the lid has to ensure the backing system for the stir zone inside the box. A successful welding of the box was done after a joint geometry optimization. The examination of the welded box concerns material characterization with microscopic methods, measuring thermal expansion in base material and stir zone and temperature measurement while FSW.

scholarly journals Thermo-Mechanical Stability and Gas-Tightness of Glass-Ceramics Joints for SOFC in the System MgO-BaO/SrO-B2O3-SiO2

2020 ◽  
Vol 7 ◽  
Author(s):  
Sonia Rodríguez-López ◽  
Jürgen Malzbender ◽  
Virginia M. Justo ◽  
Francisco C. Serbena ◽  
Sonja M. Groß-Barsnick ◽  
...  
Keyword(s):  
Mechanical Stability ◽  
Glass Ceramics ◽  
Gas Tightness

Opmizaon of work on taking gas samples from transformer gas relays

2018 ◽  
Vol 11 (2) ◽  
pp. 143-148
Author(s):  
S. P. Vysogorets
Keyword(s):  
Experimental Studies ◽  
Ambient Air ◽  
Sampling System ◽  
North West ◽  
Analysis Laboratory ◽  
Repeated Use ◽  
Two Stages ◽  
Conventional Systems ◽  
Gas Tight ◽  
Gas Tightness

Quality taking and analysis of gas and oil samples upon actuation of gas protection is an essential component of transformer operation, in making a prompt decision on its admissibility to operation after an emergency shutdown. Existing conventional systems for taking, storage and transportation of gas samples from gas relays have a number of significant drawbacks. At the same time, the devices in use at present often fail to ensure the representative nature of samples; besides, when used in line with established rules, they are inconvenient in sampling and “combustibility” checks.To solve the aforesaid problem, a study has been performed at the facilities of the physical-chemical and chromatographic analysis laboratory of the diagnostics directorate of the branch of PJSC “IDGC of North-West” on a number of advanced technologies that could be used for taking, transportation and storage of gas samples. In the experimental study, 0.5 l gastight bags made by SKC (США) (models No.237-02 and No.232-02, differing in the design of the sampling system) and 0.5 l bags made by Elchrom (model EL-PACK G-300) were used. Experimental work on examination of gas-tight bags was carried out in two stages. At the first stage, gas-tightness was assessed at room temperature, and at the second stage, the effect of negative temperatures on gas-tightness was investigated.In the course of the experimental studies, the feasibilility was confirmed of using advanced Russian and foreign technologies for taking, storage and transportation of gas samples from transformer gas relays. The models of gas-tight bags under investigation are found to be appropriate for taking, storage and transportation of gas samples, both at positive temperatures of the ambient air, and at temperatures as low as minus 15–18°С (the effects of still lower temperatures was beyond the scope of the study). To establish the feasibility of repeated use of gas-tight bags, it is proposed to continue experimental studies.

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