Important Points SOP (Standard Operating Procedure) During the Inspection of RCC NP4 Pipes

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Important Points SOP (Standard Operating Procedure) During the Inspection of RCC NP4 Pipes: -    Image-Hydro Test (Photo Credit: Ritesh Raj) (1.) Firstly, approved QAP will be checked.  (2.) ID marks should be marked on the inner and outer sides of pipes.  Image-ID Mark (Photo Credit: Ritesh Raj)  (3.) To check the inner and outer diameter of pipes.   (4.) Smooth finishing and before dispatch of RCC pipes cement slurry or grouting where required.   (5.) Load test is required for RCC pipes as per IS codes. It is different for each dia, of RCC pipes.  Image-Plate Load Test (Photo Credit: Ritesh Raj)   (6.) Concrete mix design checked and in which cement content, cement brand, and water-cement ratio should be checked.  (7.) The straightness test to be checked of RCC pipes through the straightness rods to collinear visible.   (8.) As per requirement 2% of hydro tests are to be checked as IS:458 of the total ordered quantity.  Image-Hydro Test (Pressure Release) (Photo Credit: Ritesh Raj)  
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"Description of Steel"

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Technical name of reinforcement is known as steel. Steel reinforcement is commonly known as ‘rebars’.

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Types of Steel   -   (1.) Mild Steel-----FE 250, FE 415, FE 500 & FE 550

                              (2.) Prestressed Bar

                              (3.) Hot Rolled Deformed Bar

                              (4.) Cold Worked Steel                                  

                                                                                 
Recent Post:An introduction of civil engineering


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Prefer IS Codes - (A.) IS: 800-----------General Construction of Steel

                              (B.) IS: 1786---------Specification of HYSD Bar

                              (C.)IS: 2502----------Bending & fixing of bars for concrete reinforcement

                              (D.)IS: 432-----------Specification Of mild steel & medium tensile steel bar

                                 (E.) IS: 1566-----------Hard drawn steel wire for concrete reinforcement
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             Dia. Of Steel bar with their unit weight
Sl. No.
Dia. Of Steel Bar
Unit Weight
1
6 mm
0.222 Kg/m
2
8 mm
0.395 Kg/m
3
10 mm
0.617 Kg/m
4
12 mm
0.888 Kg/m
5
16 mm
1.580 Kg/m
6
20 mm
2.469 Kg/m
7
25 mm
3.580 Kg/m
8
28 mm
4.839 Kg/m
9
32 mm
6.320 Kg/m
10
36 mm
8.000 Kg/m
11
40 mm
9.876 Kg/m
12
45 mm
12.5 Kg/m
13
50 mm
15.43 Kg/m


Also Read:List of instruments used in construction industry


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                       Allowance deviation of rolling and margin


Sl. No.                                         Dia. Of Bar                                                        Deviation

1.                                                8 mm to 10 mm                                                      + 7 %                                
2.                                              12 mm to 16 mm                                                      + 5 %

3.                                               20 mm to above                                                       + 3 %



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Abbreviations:-

HYSD- High Yield Strength Deformed Steel

TMT-Thermo Mechanically Treated


                     



Note:-

(1.)             In FE: 415 Steel, the no. 415 indicates their minimum yield stress.

(2.)             We have also seen two types of steel FE: 550, that means the steel grade is same, but 
             FE: 500 D is more ductile than FE: 500.

(3.)             We should always prefer FE:500D instead of FE:500, because FE:500D steel is enable to withstand the sudden load absorption capacity, which will helps to sustain the structure safely during earthquakes, cyclone, tsunamis etc.

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(4.)             Steel reinforcement bar is used in concrete to improve the tensile strength of concrete.  (Because steel is good in compression but weak in tension)

(5.)             Steel reinforcement bar is strong in both tension and compression.

(6.)             Length of steel bar=12 meter

(7.)             Steel reinforcement bar is coated with zinc.

(8.)             At high temperature steel reinforcement will melt. So, we are not welded the reinforcement.

(9.)             During storage of steel, we should make a platform and steel is kept on it.

(10.)         For remove the rust wire brush will used before any further work of steel.


      

Also Read:List of important IS codes

Top Steel Manufacturing Companies in India:-

(               (1.) SAIL

(              (2.) TATA Steel

(              (3.) Jindal Steel    
                    
         (4.) RINL

               (5.) MESCO 


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Written By- 
Ritesh Raj
Email Id-rajritesh.motiharirr@gmail.com

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