Capillary and compression fittings of copper and copper alloy for use with light gauge copper tube

1945 ◽  
Keyword(s):  
Copper Alloy ◽  
Copper Tube

Research on the Shrinkage Cavity and Broken Graphite Mold Core of Copper Alloy in Horizontal Continuous Casting

2011 ◽  
Vol 415-417 ◽  
pp. 1171-1175
Author(s):  
Si Nian Li ◽  
Yuan Chen ◽  
Jia Wang Ye ◽  
Shi Zhong Zhang ◽  
An Chun Xiao ◽  
...  
Keyword(s):  
Continuous Casting ◽  
Production Process ◽  
Copper Alloy ◽  
Copper Tube ◽  
Shrinkage Rate ◽  
Shrinkage Cavity ◽  
Horizontal Continuous Casting ◽  
Graphite Mold ◽  
A Company

Copper tube produced by FA6502 copper alloy in a company of Wuhan appears shrinkage cavity in horizontal continuous casting, the graphite mold core which exerts stretching effects is easy to be snapped in production process. The reason why shrinkage cavity appears is found through large number of experiments and analysis. Then we adjust the component of FA6502 copper alloy, the quality of new copper alloy FA6506 is improved significantly. Furthermore, we find the reason why the graphite mold core is snapped in production process, FA6502 copper alloy’s shrinkage rate is too large in solidification. The compact power of the graphite mold core is too large to bear, too much resistance in pulling process is exerted so that the graphite mold core is snapped.

Determining whiskering properties of tin-copper alloy solder-dipped platings

2010 ◽  
Vol 54 (3-4) ◽  
pp. 107
Author(s):  
Barbara Horváth ◽  
Balázs Illés ◽  
Tadashi Shinohara ◽  
Gábor Harsányi
Keyword(s):  
Copper Alloy ◽  
Alloy Solder

A Romanesque crucifix from Macewen's Castle, Loch Fyne, Mid Argyll

1989 ◽  
Vol 16 (1) ◽  
pp. 81-84
Author(s):  
J. G. Scott
Keyword(s):  
Copper Alloy ◽  
12Th Century ◽  
Made In

Summary This copper alloy crucifix was found during excavation at Macewen's Castle in Argyll in 1968 and closely resembles others known to date from the 12th century; it may have been made in Belgium. The arms could have been bent back to aid concealment in the 17th or 18th centuries.

Between Centre and Periphery: Early Egyptian and Nubian Copper Alloy Artefacts in the Collection of the Kunsthistorisches Museum Vienna (KHM)

2018 ◽  
Vol 28 ◽  
pp. 419-456
Author(s):  
Martin Odler ◽  
Katharina Uhlir ◽  
Marie Jentsch ◽  
Martina Griesser ◽  
Regina Hölzl ◽  
...  
Keyword(s):  
Copper Alloy

Experimental Investigation of Heat Transfer Enhancement by Using Different Number of Fins in Circular Tube

2018 ◽  
Vol 6 (3) ◽  
pp. 1-12
Author(s):  
Kamil Abdul Hussien
Keyword(s):  
Heat Transfer ◽  
Heat Exchanger ◽  
Cold Water ◽  
Finned Tube ◽  
Hot Water ◽  
Copper Tube ◽  
Smooth Tube ◽  
Tube Heat Exchanger ◽  
Mass Flow Rates ◽  
Flow Heat

Abstract-The present work investigates the enhancement of heat transfer by using different number of circular fins (8, 10, 12, 16, and 20) in double tube counter flow heat exchanger experimentally. The fins are made of copper with dimensions 66 mm OD, 22 mm ID and 1 mm thickness. Each fin has three of 14 mm diameter perforations located at 120o from each to another. The fins are fixed on a straight smooth copper tube of 1 m length, 19.9 mm ID and 22.2 mm OD. The tube is inserted inside the insulated PVC tube of 100 mm ID. The cold water is pumped around the finned copper tube, inside the PVC, at mass flow rates range (0.01019 - 0.0219) kg/s. The Reynold's number of hot water ranges (640 - 1921). The experiment results are obtained using six double tube heat exchanger (1 smooth tube and the other 5 are finned one). The results, illustrated that the heat transfer coefficient proportionally with the number of fin. The results also showed that the enhancement ratio of heat transfer for finned tube is higher than for smooth tube with (9.2, 10.2, 11.1, 12.1 13.1) times for number of fins (8, 10, 12, 16 and 20) respectively.

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