Transactions - American Society of Heating, Refrigerating and Air-Conditioning Engineers . e forcerequired to thread it that it is certain that there is little likelihoodof soft steel pipe s failing under torsional stress while being number of pipes opening in the weld in these twisting testswas about the same for soft steel and wrought iron, but the ultimatestrength of the steel i)ipe was much greater than that of the wroughtiron pipe. In making a careful study of the results of these tests, it is evidentthat the force required to thread soft steel pipe using type Adie (the narro
Transactions - American Society of Heating, Refrigerating and Air-Conditioning Engineers . e forcerequired to thread it that it is certain that there is little likelihoodof soft steel pipe s failing under torsional stress while being number of pipes opening in the weld in these twisting testswas about the same for soft steel and wrought iron, but the ultimatestrength of the steel i)ipe was much greater than that of the wroughtiron pipe. In making a careful study of the results of these tests, it is evidentthat the force required to thread soft steel pipe using type Adie (the narrow, inserted, receding chaser) is much less than TESTS THKKADING STEEL AND WROUCiHT IRON PIPE 313 the force required to thread wrought iron pipe with type C diewhich is commonly used. Several makers are now manufacturingthe improved type of die and a considerable number are alreadyin use. It is not the intention of this article to advocate any particularmake of die, but to call attention to the best type for threadingunder present conditions. A glance at the results shows the marked. No. I 314 TESTS OX THREADING STEEL AND WROUGHT IRON PIPE
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