MS PIPES



GUIDELINES FOR FACTORY INSPECTION OF MS PIPES (IS: 3589:2001)                                                             

1) Marking  

Each Pipe shall be legibly marked with the following details :

a) Indication of the source of manufacturer name or Trade mark.

b) Outside diameter and specified wall thickness.

c) Pipe designation.

2) Sampling (Physical Dimensions)

No. of pipes in the Lot Pipes or tubes (Outside dia ≤ 200 mm) Others
Sample size

Acceptance

number

Sample size Acceptance number

Up to 100

3

0

2

0

101 to 150

5

0

3

0

151 to 300

8

0

5

0

301 to500

13

0

8

0

501 to 1000

20

1

13

0

1001 to 3000

32

2

20

1

3001 to 10000

50

3

32

2

10001 and above

80

5

50

3

 Sampling (Physical Tests)

No. of pipes in the lot

Sample Number

Sampling size of each sampling test

Acceptance Number

Rejection Number

301 to 800

First

5

0

2

second

5

1

2

801 to 3000

First

8

0

2

second

8

2

3

3001 and above

First

13

1

3

second

13

3

4

Note :The sampling criteria for lot size less than 300 mm acceptance as agreed to between the purchaser and teh supplier.

3) Designation of the Grades of the Pipes :

Method of Manufacture of Pipe

Steel Grades Applicable

Seamless

Fe330

Fe410

Fe450

ERW

Fe330

Fe410

Fe450

SAW

Fe330

Fe410

Fe450

4) Physcal Dimensions :

Mass: Mass per meter run of the pipes can also be worked out by the formula as under

M = (D-T) xTx0.0246615

Where, M- Mass of the pipe Kg/m

D-Nominal Outside Dia of the tube, mm

T- Nominal thickness of the tube, mm

The tolerance of mass per cart load f 10 tones or above shall be ± 705 percent on the nominal theoretical mass of the tubes.

Outside Diameter :

Outside Diameter (For all sizes)

Tolerance

 For seamless pipes

± 1%

For ERW & SAW pipes

± 0.75%

Wall Thicness :

Outside Diameter (For all sizes)

Tolerance

 For ERW pipes

± 10%

For  SAW& seamless pipes

+20%, -12.5%

Length :

The permissible variation shall be -0, +10 mm for length up to and including 6 m.

5) Chemical Properties

Steel Grade Method of Manufacture Chemical Composition
C (Max) Mn (Max) P (Max) S (Max) CE (Max)
             
Fe330 Seamless(S) 0.16 1.2 0.04 0.04 --
Fe330 ERW 0.16 1.2 0.04 0.04 --
Fe330 SAW 0.16 1.2 0.04 0.04 --
Fe410 Seamless(S) 0.2 1.3 0.04 0.04 0.45
Fe410 ERW 0.2 1.3 0.04 0.04 0.45
Fe410 SAW 0.2 1.3 0.04 0.04 0.45
Fe450 Seamless(S) 0.25 1.2 0.04 0.04 0.45
Fe450 ERW 0.25 1.2 0.04 0.04 0.45
Fe450 SAW 0.25 1.3 0.04 0.04 0.45

6) Mechanical Properties :

Steel Grade

Method

Tensile Strength (MPa) min

Yield Stress (MPa) min

Elongation Percent min

Fe330

ERW, Seamless and SAW

330

195

20

Fe410

ERW, Seamless and SAW

410

235

18

Fe450

ERW, Seamless and SAW

450

275

15

7) Hydraulic Pressure Test :

Each pipe shall be hydraulic tested at the manufacturer’s works before the pipe is coated, wrapped and lined.

The hydraulic test pressure shall be applied for 5 secs.

 P = 2 ST/D

Where

P = Hydraulic test pressure MPa,

D = specified outside dia of the pipe in mm

T = Specified thickness of teh tube in mm

S = stress 60% of the specified minimum yield stress in MPa. The max test pressure is limited to 5 MPa whre ever applicable.

  • Thickness of Cement Mortar Lining 

Outside dia of steel Pipe (mm)

Minimum Thickness 

of lining (mm)

Tolerance (mm)

168.3 to 323.9

6

0,+2

355.6 to 610

7

0,+2

660 to 1219

9

0,+2

1321 to 2540

12

0,+3

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