1. fabrication definition fabrication is the second main process in steel lifecycle after production...
TRANSCRIPT
![Page 1: 1. Fabrication definition Fabrication is the second main process in steel lifecycle after production from mills. 2](https://reader035.vdocuments.us/reader035/viewer/2022081603/56649e635503460f94b5f3e5/html5/thumbnails/1.jpg)
1
FABRICATION AND QUALITY CONTROL OF STRUCTURAL STEEL
![Page 2: 1. Fabrication definition Fabrication is the second main process in steel lifecycle after production from mills. 2](https://reader035.vdocuments.us/reader035/viewer/2022081603/56649e635503460f94b5f3e5/html5/thumbnails/2.jpg)
2
Fabrication definition
Fabrication is the second main process in steel lifecycle after production from mills.
![Page 3: 1. Fabrication definition Fabrication is the second main process in steel lifecycle after production from mills. 2](https://reader035.vdocuments.us/reader035/viewer/2022081603/56649e635503460f94b5f3e5/html5/thumbnails/3.jpg)
3
Difference bet. Q.C & Q.AQuality control: activities used to fulfill
requirements for quality. (ex: calibration)“Quality control is a process for maintaining
standards and not for creating them.”Quality assurance: activities that do not
control quality but establish the extent to which quality will be.(ex: statistical control)
![Page 4: 1. Fabrication definition Fabrication is the second main process in steel lifecycle after production from mills. 2](https://reader035.vdocuments.us/reader035/viewer/2022081603/56649e635503460f94b5f3e5/html5/thumbnails/4.jpg)
4
Main raw materialsStandard sections Plates Fasteners Weld electrodes
![Page 5: 1. Fabrication definition Fabrication is the second main process in steel lifecycle after production from mills. 2](https://reader035.vdocuments.us/reader035/viewer/2022081603/56649e635503460f94b5f3e5/html5/thumbnails/5.jpg)
5
Main procedures• Receiving ,
storage, identification and traceability of raw materials.
• Preparation of material.
• Production.• Surface
preparation & protection.
![Page 6: 1. Fabrication definition Fabrication is the second main process in steel lifecycle after production from mills. 2](https://reader035.vdocuments.us/reader035/viewer/2022081603/56649e635503460f94b5f3e5/html5/thumbnails/6.jpg)
6
1.Receiving , storage, identification and traceability of raw materials
![Page 7: 1. Fabrication definition Fabrication is the second main process in steel lifecycle after production from mills. 2](https://reader035.vdocuments.us/reader035/viewer/2022081603/56649e635503460f94b5f3e5/html5/thumbnails/7.jpg)
7
1.Receiving , storage, identification and traceability of raw materials
Color Coding Printed Heat No.
Hard Stamp
![Page 8: 1. Fabrication definition Fabrication is the second main process in steel lifecycle after production from mills. 2](https://reader035.vdocuments.us/reader035/viewer/2022081603/56649e635503460f94b5f3e5/html5/thumbnails/8.jpg)
8
2.Preparation of materialMaterial is prepared for bolting (in site) or
welding (in next stage) by:Cutting of steel elements.Edge preparation.Holes drilling or punching.Rolling of plates.
![Page 9: 1. Fabrication definition Fabrication is the second main process in steel lifecycle after production from mills. 2](https://reader035.vdocuments.us/reader035/viewer/2022081603/56649e635503460f94b5f3e5/html5/thumbnails/9.jpg)
9
2.Preparation of material
Hole Punching
Hole Drilling
![Page 10: 1. Fabrication definition Fabrication is the second main process in steel lifecycle after production from mills. 2](https://reader035.vdocuments.us/reader035/viewer/2022081603/56649e635503460f94b5f3e5/html5/thumbnails/10.jpg)
10
3.ProductionCold forming: using bend machine
![Page 11: 1. Fabrication definition Fabrication is the second main process in steel lifecycle after production from mills. 2](https://reader035.vdocuments.us/reader035/viewer/2022081603/56649e635503460f94b5f3e5/html5/thumbnails/11.jpg)
11
Welding (main process)Factors affecting quality of weld:
1-Proper electrode2-Welding apparatus3-Welding method4-Welding position5-Edge preparation6-Control of distortion
![Page 12: 1. Fabrication definition Fabrication is the second main process in steel lifecycle after production from mills. 2](https://reader035.vdocuments.us/reader035/viewer/2022081603/56649e635503460f94b5f3e5/html5/thumbnails/12.jpg)
12
Welding (main process)Possible defects in weld:1-Lack or incomplete fusion.2-Inadequate edge preparation.3-Porosity and gas pockets.4-Undercut.5-Slag inclusion.6-Cracks.
![Page 13: 1. Fabrication definition Fabrication is the second main process in steel lifecycle after production from mills. 2](https://reader035.vdocuments.us/reader035/viewer/2022081603/56649e635503460f94b5f3e5/html5/thumbnails/13.jpg)
13
Non-destructive testsRadiography test(RT): used for small thicknesses to show the defects
inside weld .It uses x-rays and gamma rays.
Ultrasonic test (UT): using ultrasonic waves, used for large thicknesses, it’s faster and easier for judgment and need one technician to be carried out but it needs a certified and qualified technician.
Magnetic Test (MT): using magnet to identify subsurface defect up to 6 mm below surface for A.C current or up to 4 mm below surface for D.C current.
It must be used with materials that have magnetic properties.
Dye penetrant test (PT): used for identifying surface defects or subsurface but open to surface.
As red spot gots wider as defect is deeper.
![Page 14: 1. Fabrication definition Fabrication is the second main process in steel lifecycle after production from mills. 2](https://reader035.vdocuments.us/reader035/viewer/2022081603/56649e635503460f94b5f3e5/html5/thumbnails/14.jpg)
14
MT device Plan of weld
![Page 15: 1. Fabrication definition Fabrication is the second main process in steel lifecycle after production from mills. 2](https://reader035.vdocuments.us/reader035/viewer/2022081603/56649e635503460f94b5f3e5/html5/thumbnails/15.jpg)
15
4.Surface preparation & protectionMethods of preparation: -Wire brush (manual or automatic)
-Blasting using : - Sand - Marble Methods of protection:
-Painting: primer layer followed by another epoxy layer
-Galvanization: for higher protection requirements
![Page 16: 1. Fabrication definition Fabrication is the second main process in steel lifecycle after production from mills. 2](https://reader035.vdocuments.us/reader035/viewer/2022081603/56649e635503460f94b5f3e5/html5/thumbnails/16.jpg)
16
Refrences
China code of practice for steel construction and bridges.
AISC structural steel building specifications.