Osbert Chadwick Esq., C.M.G.
4/12/1906.
"tear off" the screwed end of a Pipe in process of socketting up.
However, as no details are given as to how the screwed end was "torn off" I can give no definite reply on this point.
12.
With reference to the statement that "the Pipe "went out of shape when an attempt was made to bend it". I may at once say that the bending of a 6" Wrought Iron Pipe to any considerable angle is not an easy matter, even when there is ample thickness of metal to preserve the structure from distortion. With Pipes of the thickness of these, bending anywhere except in the Manufacturer's Works, is a very dangerous proceeding unless carried out by a skilled man, and the Pipe would most surely "go out of shape" unless it was well rammed with sand previous to the operation, then very thoroughly dried and heated to a good cherry red, the bending being very gradually done, and water used judiciously.
Apparently the Pipe has been bent cold, as the original coating composition is still intact on the Pipe, and shows no sign of having been heated.
Sample No. 2:
13.
This sample of 5" Pipe has burst practically throughout its whole length, and in a straight line. This is evidently its weakest part, and on examination was found to be the thinnest part. The appearance of the fracture was so peculiar that a further examination of a cross section was undertaken. The section was polished and etched, and the structure was revealed; no large slag flaws were discovered, but the joint was found to be a Butt welded one of poor quality, instead of being lap welded as required by the Contract.
Sample No. 3:
14.
This sample has burst longitudinally through a length of 12". It was evidently a lap welded tube, and the irregularity of the crack indicated the burst to be due to some...
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Osbert Chadwick Esq., C.M.G.
4/12/1906.
"tear off" the screwed end of a Pipe in process of socketting up.
However, as no details are given as to how the screwed end was
#
torn off"
I can give no definite reply on this point.
12.
With reference to the statement that
"the Pipe
I may
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"went out of shape when an attempt was made to bend it". at once say that the bending of a 6" Wrought Iron Pipe to any considerable angle is not an easy matter, even when there is ample thickness of metal to preserve the structure from dis- tortion. With Pipes of the thickness of these, bending any- where except in the Manufacturer's Works, is a very dangerous proceeding unless carried out by a skilled man, and the Pipe would most aurely "go out of shape" unless it was well rammed with sand previous to the operation, then very thoroughly dried and heated to a good cherry red, the bending being very gradually done, and water used judiciously.
Apparently the Pipe has been
bent cold, as the original coating composition is still intact on the Pipe, and shows no sign of having been heated.
Sample No. 2:
13.
The
This sample of 5" Pipe has burst practically throughout its whole length, and in a straight line. This is evidently its weakest part, and on examination was found to be the thinnest part. The appearance of the fracture was so peculiar that a further examination of a cross section was undertaken. section was polished and etched, and the structure was revealed; no large slag flaws were discovered, but the joint was found to be a Butt welded one of poor quality, instead of being lap welded as required by the Contract.
Sample No. 3:
14.
This sample has burst longitudinally through
a length of 12" It was evidently a lap welded tube, and the irregularity of the orack indicated the burst to be due to some
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