#bohnart

[whats-in-a-sentence]

When the torch is moved from side to side, Fig. 7-7, more material is heated to the ignition temperature so that additional material is oxidized and blown out of the kerf.

"Welding: Principles and Practices", 6e - Edward R. Bohnart

[whats-in-a-sentence]

For cutting plate of 6 inches or heavier, propane, propylene, or Mapp® gas are better choices. Because a deep area must be heated, the dispersed BTU's, the bushy flame, and the high total BTU content of these gases do a good job in heavy plate cutting, Fig. 7-4.

"Welding: Principles and Practices", 6e - Edward R. Bohnart

[whats-in-a-sentence]

In the oxyacetylene flame, BTU's are created mainly in the inner cone. With the other gases, BTU's are largely dispersed through the outer flame envelope, Fig. 7-3.

"Welding: Principles and Practices", 6e - Edward R. Bohnart

[whats-in-a-sentence]

Today a number of different gases are being used, such as acetylene, propane, Mapp® gas, natural gas, and propylene.

"Welding: Principles and Practices", 6e - Edward R. Bohnart

[tenth-sentence]

This can be demonstrated in the shop by taking a thin piece of steel wire and heating it to a red heat and then submerging it in a vessel containing oxygen.

"Welding: Principles and Practices", 6e - Edward R. Bohnart

[its-a-date]

An alternative use for the newly developed blowtorch was discovered in 1890 by a bank robber in England who used one to get into a vault.

"Welding: Principles and Practices", 6e - Edward R. Bohnart

[whats-in-a-sentence]

These machines can be particularly adapted to operations in which the same pattern or design is to be cut repeatedly, Fig. 6-13.

"Welding: Principles and Practices", 6e - Edward R. Bohnart