Important: Use custom search function to get better results from our thousands of pages

Use " " for compulsory search eg:"electronics seminar" , use -" " for filter something eg: "electronics seminar" -"/tag/" (used for exclude results from tag pages)

Thread Rating:
  • 0 Votes - 0 Average
  • 1
  • 2
  • 3
  • 4
  • 5
Post: #1


.ppt  GAS WELDING[.ppt (Size: 564 KB / Downloads: 217)


It is a metal joining process in which the ends of pieces to be joined are heated at their interface by producing coalescence with one or more gas flames (such as oxygen and acetylene), with or without the use of a filler metal.

Oxy-Acetylene Welding

Process of heating metal surfaces to be joined to melting point with gas flame
Fusing metal into homogeneous mass
Letting it solidify into a single unit
Flame in cone reaches temperatures as high as 5800º to 6300ºF
Filler rod may or may not be used to intermix with molten pool.

Oxygen Cylinders

Oxygen is stored within cylinders of various sizes and pressures ranging from 2000- 2640 PSI. (Pounds Per square inch)
Oxygen cylinders are forged from solid armor plate steel. No part of the cylinder may be less than 1/4” thick.
Cylinders are then tested to over 3,300 PSI using a (NDE) hydrostatic pressure test.

Acetylene Cylinders

Acetylene is stored in cylinders specially designed for this purpose only.
Acetylene is extremely unstable in its pure form at pressure above 15 PSI (Pounds per Square Inch)
Acetone is also present within the cylinder to stabilize the acetylene.
Acetylene cylinders should always be stored in the upright position to prevent the acetone form escaping thus causing the acetylene to become unstable.

Flame Settings

There are three distinct types of oxy-acetylene flames, usually termed:
Carburizing (or “excess acetylene”)
Oxidizing (or “excess oxygen” )
The type of flame produced depends upon the ratio of oxygen to acetylene in the gas mixture which leaves the torch tip.

Flame definition

The neutral flame (Fig. 4-1) is produced when the ratio of oxygen to acetylene, in the mixture leaving the torch, is almost exactly one-to-one. It’s termed ”neutral” because it will usually have no chemical effect on the metal being welded. It will not oxidize the weld metal; it will not cause an increase in the carbon content of the weld metal.
The excess acetylene flame (Fig. 4-2), as its name implies, is created when the proportion of acetylene in the mixture is higher than that required to produce the neutral flame. Used on steel, it will cause an increase in the carbon content of the weld metal.
The oxidizing flame (Fig. 4-3) results from burning a mixture which contains more oxygen than required for a neutral flame. It will oxidize or ”burn” some of the metal being welded.

Marked Categories : seminar topics of gas welding, seminar on gas welding pdf download, oxyacetelyne welding, seminar on welding, gas welding report, welding, gas welding presentation, gas welding seminar report, gas welding seminar ppt, ppts of gas welding, ppt presentation topics welding, gas welding seminar topic, welding ppt, welding gas ppt pdf, gas welding seminar, download ppt welding topic, seminar gas welding, seminar topic on gas welding, seminar on gas welding, gas welding ppt for seminar, gas welding, http seminarprojects com thread gas welding ppt, gas welding ppt presentation download, ppt for gas welding seminar topics, gas welding ppt, seminar gas welding for ppt,

Quick Reply
Type your reply to this message here.

Image Verification
Image Verification
(case insensitive)
Please enter the text within the image on the left in to the text box below. This process is used to prevent automated posts.

Possibly Related Threads...
Thread: Author Replies: Views: Last Post
  online gas booking project in asp net Guest 1 225 17-11-2017 01:20 PM
Last Post: jaseela123
  ppt on loss less transmission through gas insulated transmissiom system Guest 2 1,181 24-10-2017 10:55 AM
Last Post: kunalpawar11
  DETECTION OF GAS LEAKAGE USING GSM seminar class 18 16,880,520 14-10-2017 11:25 AM
Last Post: jaseela123
  gas turbine blade cooling seminar report pdf Guest 1 435 13-10-2017 01:47 PM
Last Post: jaseela123
  seminar report on advanced welding processes Guest 1 162 10-10-2017 12:37 PM
Last Post: jaseela123
  air intake system for gas turbine ppt Guest 1 181 09-10-2017 01:31 PM
Last Post: jaseela123
  project report on automatic pneumatic welding machine pdf Guest 1 855 09-10-2017 12:56 PM
Last Post: jaseela123
  high sensitive lpg sensor gas leakage alert buzzer ppt Guest 1 200 09-10-2017 10:21 AM
Last Post: jaseela123
  ppt of vertical lift mechanism ppt Guest 1 508 04-10-2017 11:56 AM
Last Post: jaseela123
  srs document for online gas booking system Guest 1 262 04-10-2017 10:11 AM
Last Post: jaseela123
This Page May Contain What is GAS WELDING ppt And Latest Information/News About GAS WELDING ppt,If Not ...Use Search to get more info about GAS WELDING ppt Or Ask Here