Sixth Blogoversary

Dear Readers,

 

I am very happy to inform you that another successful year has passed and this is the Sixth Blogoversary of Engineer Diary.  It’s exactly six years of time I made my first blog post here.  I take this opportunity to thank every one of you who has stayed with us along our incredible journey in the past six years.

        Six years ago, when I started to write my first blog post, I have no idea where it would lead me and how it would change my life.  But I was very sure that the demand for technical data will always be exists and I believed that I can do better some extent.  I hope that new comers in construction industry will be benefited through this blog.

        We have to accept that our blogging has gone a little bit slow (Total 125 posts blogged during this period), but we can realize how important it has become for us and I promise that I will keep it up with more quality of information.  Since beginning I have committed for quality rather than quantity. 

Dear Readers,

Happy 6th Blogoversary for Engineer Diary

Crane & Crane Man

Provided by MasterGreetings.com

I have received so many of loving emails and comments through this blog which makes my heart beyond happy.  Now I have so many amazing friends through this blog.  I am so grateful and appreciate everyone who has given likes, wonderful comments, ideas, suggestions, asking doubts and introducing this blog to their friends.  Thanks to everyone who have offered support here along the way with love.

Have a Nice Day.

Precautions During Flood

Dear Readers,

Engineer Diary advised. following points may be noted when you encounter the flood in your residence.

1. If the water level inside your house reaches ankle level, It's time to leave.

 

2. Pack a small bag with couple days worth of cloths, toiletries, water, torch, phone charger.

 

3. Take as much cash as you can from your home.

 

4. Move all your essential documents to high ground and cover the same with plastic or keep inside the plastic bag.

 

5. Switch off electric mains and inverters before leaving, even if electricity is gone.

 

6. Keep as little as possible in the fridge.

 

7. Properly close all doors and windows before leaving. Objects can float in or out.

 

8. Secure/bring in outdoor furniture or other items that might float away and become a potential hazard.

 

9. Do not walk through moving water. Just six inches of moving water can knock you down, and two feet water can sweep your vehicle away.

 

10. Do not take shelter in a car. The power locking system can jam and trap you inside.

 

11. Do not try to drive over a flooded road. If your car stalls, abandon it immediately and seek an alternate route.

 

12. When you leave your home take one cup of sugar and salt (Equivalent quantity of both).

 

Please note that mixed water of salt and sugar will survive you two days minimum without food.

Classification of Electrode - AWS

Dear Readers,

The American Welding Society’s classification number series for welding electrodes has been adopted by the welding industry. AWS CLASSIFICATION A 5.1 & 5.5 for Covered Carbon Steel & Low alloy steel welding electrodes. The electrode identification system for steel arc welding is set up as follows:

E

7

0

1

8

X

1. Prefix Letter 'E' stands electrode for arc welding.

2. The first two digits indicate tensile strength (the resistance of the material to forces trying to pull it apart) in thousands of pounds per square inch of the deposited metal.

3. The third digit indicates the position of the weld.

            1 is for all positions;

            2 is for flat and horizontal positions only;

            3 is for flat position only.

4. The fourth digit indicates the type of electrode coating and the type of power supply used;

                0. High cellulose sodium DC reverse polarity (+)

                1. High cellulose potassium AC or  DC reverse polarity (+)

                2. High titania sodium AC or DC straight polarity (-)

                3. High titania potassium AC or DC either polarity ( ± )

                4. Iron powder titania AC or DC either polarity ( ± )

                5. Low Hydrogen sodium DC reverse polarity (+)

                6. Low Hydrogen potassium AC or  DC reverse polarity (+)

                7. High iron oxide, iron powder AC /DC (+) / DC (-)

                8. Low Hydrogen potassium ,iron powder AC/DC (+)

5. Suffix Letter 'X' stands for suffixes A1,B1,B2,B3,C1,C2,C3,D1,D2,G,M etc. and designates the chemical composition of the deposited weld metal.

Example illustrated in below picture. Click on Picture to enlarge
 

For Example let us see E7018
 

The number E7018 indicates an arc welding electrode with a minimum stress relieved tensile strength of 70,000 psi; is used in all positions; and Low Hydrogen potassium ,iron powder with AC/DC (+) polarity is required.

For More Details about Deposition of Electrode click here