Welcome

Sunday, March 17, 2024

Welding Terms (E & F)

Dear Readers,

Following Terms are commonly used in Welding works.

Edge Joint - The outer edge of two plates butted up 90 degrees parallel to each other.

Edge Preparation - Before welding the edge of a plate or pipe, care is taken to ensure a sound weld. It may be torch cut or beveled, machined with a grinder, filed, or all three.

Electrode - Electrodes come either covered with flux, or just bare wire. In the field an electrode is called a "rod" in stick welding, and "wire" for Mig and Flux Cored Arc Welding.

Electrode Extension – The length of electrode extending beyond the end of the contact tube.

Electrode Holder – A hand clamp that holds a welding rod and conducts electricity out of the rod in DIRECT CURRENT ELECTRODE NEGATIVE, or into the rod in DIRECT CURRENT ELECTRODE POSITIVE.

Electron Beam Welding – A welding process producing coalescence of metals with molten slag which melts the filler metal and the surfaces of the work to be welded. The molten weld pool is shielded by the slag, which moves along the full cross section of the joint as welding progresses.

Electroslag Welding – A welding process producing coalescence of metals with molten slag which melts the filler metal and the surfaces of the work to be welded. The molten weld pool is shielded by the slag, which moves along the full cross section of the joint as welding progresses.

Eutectoid Composition – A mixture of phases whose composition are determined by the eutectoid point in the solid region of an equilibrium diagram and whose constituents are formed by eutectoid reaction.

Face - On plate or pipe welding there is a ROOT PASS, HOT PASS, FILLER PASS, and CAP. The root penetrates through the back of the plate, the cap is on the surface which you are welding, which is the face.

Facing Surface – The surfaces of materials in contact with each other and joined or about to be joined together.

Fan: Welding machines have a fan to cool the machine down and keep it from overheating. (Check the Duty Cycle / Working Hours) Some fans run constantly, while others run "on demand" which means it comes on when necessary and clicks off when not needed.

Ferrous Metal - Ferrous means that the metal is iron, or iron with alloys.

Filler Material – The material to be added in making a welded, brazed, or soldered joint.

Fillet Weld – A weld of approximately triangular cross section that joins two surfaces approximately at right angles to each other in a lap joint, T-joint, or corner joint.

Fillet Weld Face - The surface or top of the weld.

Fillet Weld Leg - From the intersection of the joint to the end of the weld. There will be a leg for each plate.

Fillet Weld Toe - Is the end of the weld at the end of the leg. Again, there will be one for each plate.

Fillet Weld Root - Where the weld begins at the intersection of the joined plates.

Fillet Weld Throat - The distance from the root to the face.

Filter Plate – A transparent plate tinted in varying darkness for use in goggles, helmets, and hand shields to protect workers from harmful ultraviolet, infrared, and visible radiation.

Flame Spraying – A thermal spraying process using an oxy-fuel gas flame as the source of heat for melting the coating material.

Flammable Range – The range over which a gas at normal temperature (NTP) forms a flammable mixture with air.

Flat Welding Position – A welding position where the weld axis is approximately horizontal and the weld face lies in an approximately horizontal plane.

Flashback – A recession of the flame into or back of the mixing chamber of the torch.

Flashback Arrestor – A device to limit damage from a flashback by preventing the propagation of the flame front beyond the point at which the arrestor is installed.

Flash Burn - This is a burn from the radiation produced from the ULTRAVIOLET rays from the welding arc. It can burn the skin like sunburn, and even blister the cornea. You do not realize it until hours later when it feels like someone is rubbing hot sand in your eyes.

Flashing – The violent expulsion of small metal particles due to arcing during flash butt welding.

Flow Meter – Also known as a flow sensor, a flow meter is a device designed for measuring nonlinear or linear flowrate. It measures the volumetric or mass flow rate of gases.

Flux – Material used to prevent, dissolve, or facilitate removal of oxides and other undesirable surface substances.

Flux Cored Arc Welding (FCAW) – An arc welding process that produces coalescence of metals by means of tubular electrode. Shielding gas may or may not be used.

Free Bend Test - Also called a guided bend test, this is a destructive test. A coupon is cut from a test plate, the weld grinded, then the coupon (usually 1 ½ "wide by 7" long) is bent in a JIG. It is then VISUALLY INSPECTED for cracks and defects.

Friction Welding – A solid welding process which produces coalescence of material by the heat obtained from a mechanically induced sliding motion between rubbing surfaces. The work parts are held together under pressure.

Friction Stir Welding – A solid-state welding process, which produces coalescence of material by the heat obtained from a mechanically induced rotating motion between tightly butted surfaces. The work parts are held together under pressure.

Forehand Welding – A welding technique where the welding torches or gun is pointed toward the direction of welding.

Fumes - Welding fumes are a complex mixture of metals metallic oxides, silicates, and fluorides. Fumes are formed when a metal is heated above its boiling point and its vapors condense into very fine, particles (solid particulates). Welding fumes generally contain particles from the electrode and the material being welded

Fusion – The melting together of filler metal and base metal (substrate), or of base metal only, which results in coalescence.

Saturday, March 2, 2024

14th Blogiversary

 Dear Readers,

Today I am very happy and proud because this blog has completed its 14 years and today it’s entering into15th year.

I have been working in construction industry continuously for past 36 years. Like others, I struggled to gain the knowledge of this industry in my earlier days.

I have started this blog to pass on the knowledge and benefits gained from my experience to the next generation so that the newcomers do not face such difficulties like me.

I am so proud to express that I've been writing consistently over 14 years, and I am also glad that this blog does not post anything other than engineering.

So happy to know that this blog has reached more than one million page views (10365040) and 158 followers. Many more thanks to the people who made this wonderful moment and I expect you to give the same support in the future too.

This website has been without any ads from the beginning till now. Currently I have linked google AdSense which I made as a trail while I assure you to remove the ad from this blog if it gives any troubles in future.

I have been writing under my pseudonyms Crane and Craneman for so long and since it is the beginning of 15th year, I have decided to write under my original name Arivu & S.Arivazhagan.

Now I want to remember Mr. Chandru, a young man who joined us as a trainee engineer for introducing me to these blogs concept 14 years ago. He also explained me how to start a blog and also express our knowledge and thoughts through the blog. I extend my sincere thanks and gratitude to him at this auspicious moment.

For your kind information, this blog will continue as always with minimum one post per month and maximum 25 posts per year.

Dear readers and friends, I kindly request you to continue your support to my blog.

Once again I thank you all…….

Sunday, February 25, 2024

Structural Steel Standard of Chinese

 Dear Readers,

As you are well aware due to globalization all works has been very competitive and it is helping us to exchange of knowledge and standards, in this scenario Chinese works are having more impact and competition throughout the world. Now it is very essential to know the Chinese standards and how it is indicated in drawings. Let us discuss how to identify and compare with our standards.

All Chinese standards are having prefix GB like IS for Indian Standard, JIS for Japanese. For Construction related works and other works different Chinese standards are followed, which are listed below.

GB= GuojiaBiaozhun( National Standard in Chinese)

SY = Shi You (Petroleum)

JB =  JianBiao(Construction Standard)

GB/T = T : Tuijian(recommended GB)

HG =  HuaGong (PetroChemical)

Chinese standards for General structural steel (including chequered steel) is GB/T 700-2006. Grade of materials available is Q235 (A/B/C/D); Q275 (A/B/C/D).

Generally Chinese Steel Grades are Q195, Q215, Q235, Q255 and Q275 is used for Structural works. steel grades by the yield point of the letter on behalf of (Q) and yield point value is mentioned and sub grade A, B, C & D are used for further classification. For Example Q235A means, it is a carbon steel and having maximum yield strength of 235 Mpa

For Steel section Channel is mentioned as "C"; Angles are mentioned as "L" and Beams are mentioned as “I “or “H " followed by number. To find out the size of section is number multiple by 10 is the size of member.

For Example C16 means Channel 160 mm depth. Similarly H10 means H section 100 mm depth.

If the same size but width or Flange size is different then suffix a, b, c is shown. For example C20a & C20b, Both are 200 Channel however flange is 73 and 75 mm respectively. C20a means Channel 200 X 73 and C20b means Channel 200 X 75

Related Posts Plugin for WordPress, Blogger...

Labels

Abbreviations (27) ABW (1) AC (2) Acre (2) Admixture (3) Alloy Steel (1) Analysis (1) ANSI (1) Anti friction bearing (2) Apothecaries Mass (1) Arc welding (1) Avoirdupois Mass (1) AWG (4) AWS (4) BCR 295 (2) Beam (22) Bearings (5) Blasting & Painting (8) Blogoversary (4) Bolt (8) CAR A/C (1) Cartoon (2) Cement (1) Cent (2) CHANNEL (8) Chequered Plate (1) Chinese (4) Civil (7) Classification (3) Cleaning (4) Cold Rolled Steel (2) Colour Code (1) Column Section (1) Computer (1) Concrete (4) Construction Industry (11) Conversion Table (4) Cooking (1) Crane Rail (2) Cylinders (1) Density (1) DFT (2) Drill bit (1) Drill gauge (1) Drilling (1) Dry Ice (1) EHS (1) Electrical (1) Electrode (1) Ellipcon Steel (1) Elliptical Hollow Section (1) EN 10083-3 (1) EN 10219 (1) Engineer Day (7) Engineering Miracle (2) Environment (1) Equipment (2) ESI (1) European Steel (3) Factory Act (1) fasteners (1) Fibre Rope (4) Fire (1) FLAT (3) floating crane (1) Flood (1) Foil (1) Formula (1) FRP (2) GAUGE (9) General (32) Greetings (9) H-beam (4) Handrail (1) Heavy Weight Beam (1) HeliArc (1) Helmet (2) HEXAGOAN (2) Hollow Rectangle (3) Hollow Square (5) Hollow Steel (10) Hot rolled Steel (30) HR & IR (2) HSFG (1) HSS (9) HT BOLT (1) I-Beam (4) Information (8) Informations (4) Introduce (4) IP (1) IPE (3) IS 1173 (5) IS 1363 (2) IS 1786 (1) IS 3443 (2) IS 4923 (2) IS 808 (15) IS:1732 (1) ISA (2) ISCR (1) ISHB (3) ISJB (4) ISJC (2) ISLB (3) ISLC (2) ISMB (4) ISMC (2) ISMCP (1) ISNT (2) ISSC (2) ISWB (3) JIS G3466 (1) Joints (1) Junior Beam (2) Junior Channel (3) Labour Law (5) Labour Welfare (3) Lamination (1) Land Measurement (2) Light Beam (2) Light Channel (3) LPG Cylinder (1) Man Day (1) Man Hour (1) Man Month (1) Mass (3) Measurement (3) mechanical (1) Metals (7) Mile Stone (2) Music Wire (4) MWG (6) Non-Metal (2) Numbers (3) OCTOGAN (1) Oil (1) Painting (6) Parallel Flange Channel (2) PFC (2) PIPE (4) Piping (4) Planning (2) Plastics (2) Plates (1) Pole (1) PPE (1) Precautions (3) Protection (1) Rain (1) Rebar (1) Reconciliation (2) Reinforcement Rod (1) Reinforcemnt Steel (1) Reo (1) Rigging (9) River on River (1) Rope (7) ROUND (2) RSJ (1) Safety (14) Scale (1) Self Explanatory (5) SEP (5) Serrated Flat (1) Sheet (3) Short cut key (1) Sling (1) Slit Tee (1) Specific Gravity (4) Spoon (1) SQUARE (2) SSPC (1) Steel (21) Steel Beam (7) Steel Section (6) Steel Section Type (5) Stick welding (1) Structural Steel (58) Surface Preparation (8) SWG (5) SWL (1) Technical (9) Tee Section (5) Thanks (7) TIG (1) TIG Welding (1) Tips (2) Tools & Tackles (2) Torque (6) Troy Mass (1) TUBE (2) Turnbuckle (1) UB (2) UC (2) Unit of Mass (1) UNIT WEIGHT (57) Universal Beam (1) universal Column (2) Useful Tips (2) Valve (1) Water (4) Weather (1) Weight (14) Welding (12) Wide Flange Beam (2) Wind (7) Wind Speed (4) Wire Rope (3) Wishes (19) WWD (1)

Contact Form

Name

Email *

Message *

Note

1) I have extracted the information from reference sources which may not be in accordance with the latest Standards - as identified.

2) The data’s are based on a review of various reference sources. For important work please check against quality information sources.

3) The Articles are no way connected to company of author belongs.

4) This Blog will not be liable for any, direct or indirect, consequential or incidental damages or loss arising out of the use of this information.

5) If you have any suggestions or feedback on how this blog can improve it for you, please feel free to e-mail me (engineerdiary@gmail.com) Self will try my best to keep up with it!

6) Paypal account of this site is engineerdiary@gmail.com

7) If your brand/company is keen to work with Engineer Diary for advertisement and sponsorship, you can drop us an email at engineerdiary@gmail.com

8) For More Disclaimer please refer Disclaimer Page