10/14/13 Oxy-Acetylene Gas Welding Technique - Edu Support edu-support.blogspot.com/2012/10/oxy-acetylene-gas-welding-technique.html 1/5 7 Online Visitors Home Terms and Conditions Privacy Policy Oxy-Acetylene Gas Welding Technique There are different welding techniques for welding mild steel. They are as follows: Leftward or forward welding. Rightward or backward welding. Vertical welding, single or double. Overhead welding. Linde welding. Leftward or Forward Welding The leftward method of welding is also known as forward welding. It is the oldest and most widely established method for the butt-welding of steel plates. Recent developments have shown that above certain thickness, the leftward method cannot be used successfully, but within its sphere of application, which is limited of thickness, it gives excellent results and is the most satisfactory method, both from the point of view of the economy of the joint and the resultant mechanical properties of the weld. Welding is commenced at the right hand edge of the plate and proceeds across the plane in a leftward direction, the blowpipe following the welding rod. (Ref Fig 1) Fig 1 Leftward or Forward Welding It is necessary to bevel the plates upto 1/8” thickness, but there should be an included angle of bevel of at least 80º for thickness between 1/8”and 3/16”, above 3/16” thickness under normal condition, it is not economical to use the leftward method and it should be replaced by rightward method. Table 1 Data for Leftward or Forward Welding Sheet thickness (inch) 1/32” 1/16” 3/32” 1/8” 5/32” 3/16” Welding speed ft./Hr. 20-25 25-30 20-25 18-20 15-18 12-15 Power of blowpipe Cu.ft. of C 2 H 2 /Hr. 1-2 2-3 3-5 5-7 7-10 10-13 Dia of welding Rod (Inch) 1/32 1/16 3/32 3/32 1/8 1/8 Consumption of welding wire per foot of weld (ft.) 1.0 1.75 2.75 1.65 2.1 4.8 Rightward or Backward Welding During the past few years much publicity has been attached to the rightward method of welding and the results obtained by this method. Investigations show that the all these claims have been adequately sustained. The rightward method of welding consists of commencing at the left-hand side of the plate and proceeding towards the right, the filler rod following the blowpipe (Refer Fig 2). It will be observed that the blowpipe point in the direction of the completed weld and that it moves regularly along the seam. There is no lateral movement of the blowpipe, rather the end of the filler rod describes a series of loops and doesn’t progress steadily as in case of the leftward welding. It is not necessary to bevel the edges of the plate between 3/16” to 5/16” and even when a bevel is necessary the included angle should be only 60º and 80º as in the previous case. Further differences, all of which must be learnt and remembered if the method is to be applied successfully, are that the welding rod is held at an angle of 40º-50º to the job and not 30º-40º, which is the case in leftward welding. On other hand, the blowpipe is held much flatter i.e. the angle of the blowpipe to the plate is only 40º-50º as compared with the 60º-70º required in the case of leftward method. These differences in the angle of the bevel, movement of the rod, angle of the filler rod and angle of blowpipe are of real importance and significance. 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Transcript
101413 Oxy-Acetylene Gas Welding Technique - Edu Support
There are different welding techniques for welding mild steel They are as follows
Leftward or forward weldingRightward or backward welding
Vertical welding single or doubleOverhead welding
Linde welding
Leftward or Forward Welding
The leftward method of welding is also known as forward welding It is the oldest and most widely established method forthe butt-welding of steel plates Recent developments have shown that above certain thickness the leftward methodcannot be used successfully but within its sphere of application which is limited of thickness it gives excellent results andis the most satisfactory method both from the point of view of the economy of the joint and the resultant mechanicalproperties of the weld
Welding is commenced at the right hand edge of the plate and proceeds across the plane in a leftward direction theblowpipe following the welding rod (Ref Fig 1)
Fig 1 Leftward or Forward Welding
It is necessary to bevel the plates upto 18rdquo thickness but there should be an included angle of bevel of at least 80ordm forthickness between 18rdquoand 316rdquo above 316rdquo thickness under normal condition it is not economical to use the leftwardmethod and it should be replaced by rightward method
During the past few years much publicity has been attached to the rightward method of welding and the results obtained bythis method Investigations show that the all these claims have been adequately sustained
The rightward method of welding consists of commencing at the left-hand side of the plate and proceeding towards theright the filler rod following the blowpipe (Refer Fig 2) It will be observed that the blowpipe point in the direction of thecompleted weld and that it moves regularly along the seam There is no lateral movement of the blowpipe rather the end ofthe filler rod describes a series of loops and doesnrsquot progress steadily as in case of the leftward welding It is notnecessary to bevel the edges of the plate between 316rdquo to 516rdquo and even when a bevel is necessary the included angleshould be only 60ordm and 80ordm as in the previous case Further differences all of which must be learnt and remembered if themethod is to be applied successfully are that the welding rod is held at an angle of 40ordm-50ordm to the job and not 30ordm-40ordmwhich is the case in leftward welding On other hand the blowpipe is held much flatter ie the angle of the blowpipe to theplate is only 40ordm-50ordm as compared with the 60ordm-70ordm required in the case of leftward method These differences in the angleof the bevel movement of the rod angle of the filler rod and angle of blowpipe are of real importance and significance
With regard the mechanical properties of the weld the enhance ductility elongation etc are due to the annealing effectsThe flame playing on the finished weld prevents the weld zone from cooling down suddenly and so prevents brittle depositThere is less risk of excessive oxidation A further advantage is that the heat is more localized and consequently the effectsof distortion are greatly reduced
Dia of welding Rod (Inch) 332rdquo 18rdquo 532rdquo frac14rdquo frac14rdquo frac14rdquo
Consumption of weldingwire per foot of weld (ft)
34 34 34 575 675 975
Advantage of Rightward Welding Over Leftward Welding
The following are some of the advantages of rightward welding over leftward welding process
Consumption of filler rod is less
Welds are made fasterLess chance for expansion or contraction
Flame anneals the weld portion therefore the mechanical properties are superiorBetter control of weld as the molten pool can be viewed clearly
Less risk of excessive oxidation as the reducing flame covers the weld
Vertical Welding
When the welding plane is in a vertical position the welding method applied is vertical welding This method of weldinghas many advantages Bevelling is not required upto 58rdquo thickness welds can be made rapidly and distortion is reduced
to minimum
Fig 3 Single and Double Vertical Welding
Annealing effect is also obtained as far rightward welding Vertical welding is divided into two different methods (Refer Fig
3)
Welding from one side only (Single Operator Method)Welding from both sides (Double Operator Method)
Overhead Welding
In this position the welding is done from the underside of the joint and where the axis of the joint and base metal are bothhorizontal (Refer Fig 4) This is the most difficult position for welding In this welding the welder should wear all protective
clothing and helmet The position of the welding rod and welding torch is almost same as the welding in horizontalposition Here the force from the gas velocity and the surface tension of the metal prevent the molten metal falling from the
weld zone Care should be taken not to over heat the metal
Welding Education
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Continuing Education
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Interactive Mathematics
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101413 Oxy-Acetylene Gas Welding Technique - Edu Support
One method of keeping the molten metal from becoming too hot is to use a flip motion of the torch tip (Refer Fig 5) This isa quick movement of the tip from the puddle (molten pool) and back again The momentary removal of the flame allows the
puddle and bead to cool slightly
Fig 5 Flip Motion in Overhead Welding
Pipe Welding
The method of making butt welds in steel pipes is similar to that of making welds in equivalent thickness of MS plates In
straight line or angle joint tacking in jigs is advisable For smaller diameter pipes tacking in two places is enough For 2rdquoand above tacking at three or more equidistant places is better Edge preparation is as in the case of plate welding Pipes
are welded mainly by two methods
Roll welding
Fixed position welding
Roll Welding In roll welding the weld is started at the three orsquoclock position and welded to the top of the pipe The pipe isthen rotated 90 degrees Welding continues at the three orsquoclock position and ends at the topThis continue until the joint is
finished (Refer Fig 6) When using this technique no overhead and only small amount of vertical welding is required Mostof the welding is carried in flat position The size of the torch tip is same as for the same thickness of flat sheet or plate The
welding can be done by either fore hand or back hand position The weld is usually reinforced 116rdquoabove the pipe wallupto a thickness of 38rdquo and 18rdquo for 38rdquo an above The width of the bead should be approximately 1 frac12 to 2 times the wall
thickness
Fig 6 Rolling Method of Welding Pipe
Fixed position welding When it is difficult or impossible to roll the pipe then welding is done keeping it in a fixed position
Sometimes this must be done in cramped quarters and other adverse condition but the weld must be as secure as anyother weld In this type the weld must be started at the bottom and welded up both sides of the pipe up to the top (Refer Fig
7) The blowpipe must be held vertically while welding the bottom as this will assist holding the metal ion place
101413 Oxy-Acetylene Gas Welding Technique - Edu Support
To weld at angles pipes are cut with a hacksaw or ground to the required angles and set so as to give wall contact Edges
are prepared as required for the thickness and tacking is done after setting in jig available and welded either by the
leftward or rightward method according to thickness The rest of the technique employed is as used for butt joints (ReferFig 8)
Fig 8 Elbow Joint
Pipe to Plate Welding
A blowpipe tip one size larger will normally be chosen for a particular thickness in butt-welding is selected for this type of
welding The blowpipe is held at a 50deg angle and the welding rod at 70-75deg The tip of the blowpipe should be directed
slightly more towards the plate than to the pipe Holding the pipe too high will result in undercut the vertical leg The main
features of a sound weld are
Good fusion of there whole surface of the pieces and then slightly reinforcement at the joint as in the case of fillet
weldIf any bevel is made the chamfering is filled to a level slightly higher than its surface
Absence of any porous metal in the joint
Strong section and no undercut of the parent metal
Linde Welding
This is a special technique used for the welding of pipes with a carburising flame The excess of carbon in the carburising
flame cause an addition to the carbon content of the outer layer of the steel and thereby reduces its melting point and alsocauses it to sweat at a lower temperature lower than its melting point With specially graded linde rod it is then possible to
carry out welds on mild steel at temperature below its melting point and at greater speeds
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More Info About Capella
University
wwwCapellaedu
Welding Education
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Like 24
101413 Oxy-Acetylene Gas Welding Technique - Edu Support
I really like this great job folksppi claims on mortgages
Sir David January 11 2013 at 1209 AM
Reply
No doubt why you get so many blog commentsppi claims companies
Krystal Beauchamp June 15 2013 at 200 AM
Reply
There are many different techniques of welding and is a trade that will remain very importantIndustrial Laser welding and cutting and has specific training for use of them and I am assumingthat this type of welding also needs professional training
3 comments
Post a Comment
Enter your comment
Comment as Google Account
Publish
Preview
Support Creating Website | Johny Template | Mas Template
Copyright copy 2011 Edu Support - All Rights Reserved
Template Created by Creating Website Published by Mas Template
Proudly powered by Blogger
Edu Support by AlivaDot is licensed under a Creative Commons Attribution-NonCommercial-NoDerivs 30 Unported License
Based on a work at edu-supportblogspotcom
Permissions beyond the scope of this license may be available at Terms and Conditions
laquo Prev Post Next Post raquoHome
101413 Oxy-Acetylene Gas Welding Technique - Edu Support
With regard the mechanical properties of the weld the enhance ductility elongation etc are due to the annealing effectsThe flame playing on the finished weld prevents the weld zone from cooling down suddenly and so prevents brittle depositThere is less risk of excessive oxidation A further advantage is that the heat is more localized and consequently the effectsof distortion are greatly reduced
Dia of welding Rod (Inch) 332rdquo 18rdquo 532rdquo frac14rdquo frac14rdquo frac14rdquo
Consumption of weldingwire per foot of weld (ft)
34 34 34 575 675 975
Advantage of Rightward Welding Over Leftward Welding
The following are some of the advantages of rightward welding over leftward welding process
Consumption of filler rod is less
Welds are made fasterLess chance for expansion or contraction
Flame anneals the weld portion therefore the mechanical properties are superiorBetter control of weld as the molten pool can be viewed clearly
Less risk of excessive oxidation as the reducing flame covers the weld
Vertical Welding
When the welding plane is in a vertical position the welding method applied is vertical welding This method of weldinghas many advantages Bevelling is not required upto 58rdquo thickness welds can be made rapidly and distortion is reduced
to minimum
Fig 3 Single and Double Vertical Welding
Annealing effect is also obtained as far rightward welding Vertical welding is divided into two different methods (Refer Fig
3)
Welding from one side only (Single Operator Method)Welding from both sides (Double Operator Method)
Overhead Welding
In this position the welding is done from the underside of the joint and where the axis of the joint and base metal are bothhorizontal (Refer Fig 4) This is the most difficult position for welding In this welding the welder should wear all protective
clothing and helmet The position of the welding rod and welding torch is almost same as the welding in horizontalposition Here the force from the gas velocity and the surface tension of the metal prevent the molten metal falling from the
weld zone Care should be taken not to over heat the metal
Welding Education
Distance Learning
Continuing Education
eLearning Solutions
Online Education Courses
Interactive Mathematics
ads by Yahoo
101413 Oxy-Acetylene Gas Welding Technique - Edu Support
One method of keeping the molten metal from becoming too hot is to use a flip motion of the torch tip (Refer Fig 5) This isa quick movement of the tip from the puddle (molten pool) and back again The momentary removal of the flame allows the
puddle and bead to cool slightly
Fig 5 Flip Motion in Overhead Welding
Pipe Welding
The method of making butt welds in steel pipes is similar to that of making welds in equivalent thickness of MS plates In
straight line or angle joint tacking in jigs is advisable For smaller diameter pipes tacking in two places is enough For 2rdquoand above tacking at three or more equidistant places is better Edge preparation is as in the case of plate welding Pipes
are welded mainly by two methods
Roll welding
Fixed position welding
Roll Welding In roll welding the weld is started at the three orsquoclock position and welded to the top of the pipe The pipe isthen rotated 90 degrees Welding continues at the three orsquoclock position and ends at the topThis continue until the joint is
finished (Refer Fig 6) When using this technique no overhead and only small amount of vertical welding is required Mostof the welding is carried in flat position The size of the torch tip is same as for the same thickness of flat sheet or plate The
welding can be done by either fore hand or back hand position The weld is usually reinforced 116rdquoabove the pipe wallupto a thickness of 38rdquo and 18rdquo for 38rdquo an above The width of the bead should be approximately 1 frac12 to 2 times the wall
thickness
Fig 6 Rolling Method of Welding Pipe
Fixed position welding When it is difficult or impossible to roll the pipe then welding is done keeping it in a fixed position
Sometimes this must be done in cramped quarters and other adverse condition but the weld must be as secure as anyother weld In this type the weld must be started at the bottom and welded up both sides of the pipe up to the top (Refer Fig
7) The blowpipe must be held vertically while welding the bottom as this will assist holding the metal ion place
101413 Oxy-Acetylene Gas Welding Technique - Edu Support
To weld at angles pipes are cut with a hacksaw or ground to the required angles and set so as to give wall contact Edges
are prepared as required for the thickness and tacking is done after setting in jig available and welded either by the
leftward or rightward method according to thickness The rest of the technique employed is as used for butt joints (ReferFig 8)
Fig 8 Elbow Joint
Pipe to Plate Welding
A blowpipe tip one size larger will normally be chosen for a particular thickness in butt-welding is selected for this type of
welding The blowpipe is held at a 50deg angle and the welding rod at 70-75deg The tip of the blowpipe should be directed
slightly more towards the plate than to the pipe Holding the pipe too high will result in undercut the vertical leg The main
features of a sound weld are
Good fusion of there whole surface of the pieces and then slightly reinforcement at the joint as in the case of fillet
weldIf any bevel is made the chamfering is filled to a level slightly higher than its surface
Absence of any porous metal in the joint
Strong section and no undercut of the parent metal
Linde Welding
This is a special technique used for the welding of pipes with a carburising flame The excess of carbon in the carburising
flame cause an addition to the carbon content of the outer layer of the steel and thereby reduces its melting point and alsocauses it to sweat at a lower temperature lower than its melting point With specially graded linde rod it is then possible to
carry out welds on mild steel at temperature below its melting point and at greater speeds
Capella University
Interested in Online Schools Get
More Info About Capella
University
wwwCapellaedu
Welding Education
Go To Localcom To Find Local
Businesses And Services Near You
Localcom
Lumosity Brain Games
Improve Memory and Attention
with Scientific Brain Games Free
Trial
wwwLumositycom
College Textbook Answers
Even amp Odd Answers for Math
Science amp Engineering Textbooks
CheggcomHomework-Help
ads by Yahoo
Like 24
101413 Oxy-Acetylene Gas Welding Technique - Edu Support
I really like this great job folksppi claims on mortgages
Sir David January 11 2013 at 1209 AM
Reply
No doubt why you get so many blog commentsppi claims companies
Krystal Beauchamp June 15 2013 at 200 AM
Reply
There are many different techniques of welding and is a trade that will remain very importantIndustrial Laser welding and cutting and has specific training for use of them and I am assumingthat this type of welding also needs professional training
3 comments
Post a Comment
Enter your comment
Comment as Google Account
Publish
Preview
Support Creating Website | Johny Template | Mas Template
Copyright copy 2011 Edu Support - All Rights Reserved
Template Created by Creating Website Published by Mas Template
Proudly powered by Blogger
Edu Support by AlivaDot is licensed under a Creative Commons Attribution-NonCommercial-NoDerivs 30 Unported License
Based on a work at edu-supportblogspotcom
Permissions beyond the scope of this license may be available at Terms and Conditions
laquo Prev Post Next Post raquoHome
101413 Oxy-Acetylene Gas Welding Technique - Edu Support
One method of keeping the molten metal from becoming too hot is to use a flip motion of the torch tip (Refer Fig 5) This isa quick movement of the tip from the puddle (molten pool) and back again The momentary removal of the flame allows the
puddle and bead to cool slightly
Fig 5 Flip Motion in Overhead Welding
Pipe Welding
The method of making butt welds in steel pipes is similar to that of making welds in equivalent thickness of MS plates In
straight line or angle joint tacking in jigs is advisable For smaller diameter pipes tacking in two places is enough For 2rdquoand above tacking at three or more equidistant places is better Edge preparation is as in the case of plate welding Pipes
are welded mainly by two methods
Roll welding
Fixed position welding
Roll Welding In roll welding the weld is started at the three orsquoclock position and welded to the top of the pipe The pipe isthen rotated 90 degrees Welding continues at the three orsquoclock position and ends at the topThis continue until the joint is
finished (Refer Fig 6) When using this technique no overhead and only small amount of vertical welding is required Mostof the welding is carried in flat position The size of the torch tip is same as for the same thickness of flat sheet or plate The
welding can be done by either fore hand or back hand position The weld is usually reinforced 116rdquoabove the pipe wallupto a thickness of 38rdquo and 18rdquo for 38rdquo an above The width of the bead should be approximately 1 frac12 to 2 times the wall
thickness
Fig 6 Rolling Method of Welding Pipe
Fixed position welding When it is difficult or impossible to roll the pipe then welding is done keeping it in a fixed position
Sometimes this must be done in cramped quarters and other adverse condition but the weld must be as secure as anyother weld In this type the weld must be started at the bottom and welded up both sides of the pipe up to the top (Refer Fig
7) The blowpipe must be held vertically while welding the bottom as this will assist holding the metal ion place
101413 Oxy-Acetylene Gas Welding Technique - Edu Support
To weld at angles pipes are cut with a hacksaw or ground to the required angles and set so as to give wall contact Edges
are prepared as required for the thickness and tacking is done after setting in jig available and welded either by the
leftward or rightward method according to thickness The rest of the technique employed is as used for butt joints (ReferFig 8)
Fig 8 Elbow Joint
Pipe to Plate Welding
A blowpipe tip one size larger will normally be chosen for a particular thickness in butt-welding is selected for this type of
welding The blowpipe is held at a 50deg angle and the welding rod at 70-75deg The tip of the blowpipe should be directed
slightly more towards the plate than to the pipe Holding the pipe too high will result in undercut the vertical leg The main
features of a sound weld are
Good fusion of there whole surface of the pieces and then slightly reinforcement at the joint as in the case of fillet
weldIf any bevel is made the chamfering is filled to a level slightly higher than its surface
Absence of any porous metal in the joint
Strong section and no undercut of the parent metal
Linde Welding
This is a special technique used for the welding of pipes with a carburising flame The excess of carbon in the carburising
flame cause an addition to the carbon content of the outer layer of the steel and thereby reduces its melting point and alsocauses it to sweat at a lower temperature lower than its melting point With specially graded linde rod it is then possible to
carry out welds on mild steel at temperature below its melting point and at greater speeds
Capella University
Interested in Online Schools Get
More Info About Capella
University
wwwCapellaedu
Welding Education
Go To Localcom To Find Local
Businesses And Services Near You
Localcom
Lumosity Brain Games
Improve Memory and Attention
with Scientific Brain Games Free
Trial
wwwLumositycom
College Textbook Answers
Even amp Odd Answers for Math
Science amp Engineering Textbooks
CheggcomHomework-Help
ads by Yahoo
Like 24
101413 Oxy-Acetylene Gas Welding Technique - Edu Support
I really like this great job folksppi claims on mortgages
Sir David January 11 2013 at 1209 AM
Reply
No doubt why you get so many blog commentsppi claims companies
Krystal Beauchamp June 15 2013 at 200 AM
Reply
There are many different techniques of welding and is a trade that will remain very importantIndustrial Laser welding and cutting and has specific training for use of them and I am assumingthat this type of welding also needs professional training
3 comments
Post a Comment
Enter your comment
Comment as Google Account
Publish
Preview
Support Creating Website | Johny Template | Mas Template
Copyright copy 2011 Edu Support - All Rights Reserved
Template Created by Creating Website Published by Mas Template
Proudly powered by Blogger
Edu Support by AlivaDot is licensed under a Creative Commons Attribution-NonCommercial-NoDerivs 30 Unported License
Based on a work at edu-supportblogspotcom
Permissions beyond the scope of this license may be available at Terms and Conditions
laquo Prev Post Next Post raquoHome
101413 Oxy-Acetylene Gas Welding Technique - Edu Support
To weld at angles pipes are cut with a hacksaw or ground to the required angles and set so as to give wall contact Edges
are prepared as required for the thickness and tacking is done after setting in jig available and welded either by the
leftward or rightward method according to thickness The rest of the technique employed is as used for butt joints (ReferFig 8)
Fig 8 Elbow Joint
Pipe to Plate Welding
A blowpipe tip one size larger will normally be chosen for a particular thickness in butt-welding is selected for this type of
welding The blowpipe is held at a 50deg angle and the welding rod at 70-75deg The tip of the blowpipe should be directed
slightly more towards the plate than to the pipe Holding the pipe too high will result in undercut the vertical leg The main
features of a sound weld are
Good fusion of there whole surface of the pieces and then slightly reinforcement at the joint as in the case of fillet
weldIf any bevel is made the chamfering is filled to a level slightly higher than its surface
Absence of any porous metal in the joint
Strong section and no undercut of the parent metal
Linde Welding
This is a special technique used for the welding of pipes with a carburising flame The excess of carbon in the carburising
flame cause an addition to the carbon content of the outer layer of the steel and thereby reduces its melting point and alsocauses it to sweat at a lower temperature lower than its melting point With specially graded linde rod it is then possible to
carry out welds on mild steel at temperature below its melting point and at greater speeds
Capella University
Interested in Online Schools Get
More Info About Capella
University
wwwCapellaedu
Welding Education
Go To Localcom To Find Local
Businesses And Services Near You
Localcom
Lumosity Brain Games
Improve Memory and Attention
with Scientific Brain Games Free
Trial
wwwLumositycom
College Textbook Answers
Even amp Odd Answers for Math
Science amp Engineering Textbooks
CheggcomHomework-Help
ads by Yahoo
Like 24
101413 Oxy-Acetylene Gas Welding Technique - Edu Support
I really like this great job folksppi claims on mortgages
Sir David January 11 2013 at 1209 AM
Reply
No doubt why you get so many blog commentsppi claims companies
Krystal Beauchamp June 15 2013 at 200 AM
Reply
There are many different techniques of welding and is a trade that will remain very importantIndustrial Laser welding and cutting and has specific training for use of them and I am assumingthat this type of welding also needs professional training
3 comments
Post a Comment
Enter your comment
Comment as Google Account
Publish
Preview
Support Creating Website | Johny Template | Mas Template
Copyright copy 2011 Edu Support - All Rights Reserved
Template Created by Creating Website Published by Mas Template
Proudly powered by Blogger
Edu Support by AlivaDot is licensed under a Creative Commons Attribution-NonCommercial-NoDerivs 30 Unported License
Based on a work at edu-supportblogspotcom
Permissions beyond the scope of this license may be available at Terms and Conditions
laquo Prev Post Next Post raquoHome
101413 Oxy-Acetylene Gas Welding Technique - Edu Support
I really like this great job folksppi claims on mortgages
Sir David January 11 2013 at 1209 AM
Reply
No doubt why you get so many blog commentsppi claims companies
Krystal Beauchamp June 15 2013 at 200 AM
Reply
There are many different techniques of welding and is a trade that will remain very importantIndustrial Laser welding and cutting and has specific training for use of them and I am assumingthat this type of welding also needs professional training
3 comments
Post a Comment
Enter your comment
Comment as Google Account
Publish
Preview
Support Creating Website | Johny Template | Mas Template
Copyright copy 2011 Edu Support - All Rights Reserved
Template Created by Creating Website Published by Mas Template
Proudly powered by Blogger
Edu Support by AlivaDot is licensed under a Creative Commons Attribution-NonCommercial-NoDerivs 30 Unported License
Based on a work at edu-supportblogspotcom
Permissions beyond the scope of this license may be available at Terms and Conditions
![[PPT]Oxy-Acetylene Cutting Safety - Home | Occupational … · Web viewOxy-Acetylene Cutting Safety in Agriculture OSHA Standard 1910.253 Produced by Idaho State University Office](https://static.documents.pub/doc/80x56/5abfe75a7f8b9ac6688b7fa4/pptoxy-acetylene-cutting-safety-home-occupational-viewoxy-acetylene-cutting.jpg)
