Products : TUBE MILL : ASTM A 135

BLACK AND HOT DIP GALVANIZED STEEL PIPES = ASTM A 135 / GRADE A / B

 

  
NOMINAL PIPE SIZE

OUTSIDE DIAMETER

WALL THICKNESS

WEIGHT OF BLACK PIPES

 

STANDARD

STANDARD

PLAIN END PIPES

TEST PRESSURE

INCH

MM

INCH

MM

INCH

MM

KG/MTR

MTR/TON

LB/FT

FT/TON

PSI

KPA

3/4

20

1.050

26.7

0.083*

2.11

1.28

781

0.86

2562

700

4830

1

25

1.315

33.4

0.109*

2.77

2.09

478

1.41

1568

700

4830

1.1/4

32

1.660

42.2

0.109*

2.77

2.69

372

1.81

1221

1000

6890

1.1/2

40

1.900

48.30

0.109*

2.77

3.11

322

2.09

1056

1000

6890

2

50

2.375

60.3

0.109*

2.77

3.93

254

2.64

833

1000

6890

2.1/2

65

2.875

73.0

0.120*

3.05

5.26

190

3.53

623

1000

6890

3

80

3.500

88.9

0.120*

3.05

6.46

155

4.34

509

1000

6890

3.1/2

90

4.000

101.6

0.120*

3.05

7.41

135

4.98

443

1200

8270

4

100

4.500

114.3

0.120*

3.05

8.37

119

5.62

390

1200

8270

5

125

5.563

141.3

0.134*

3.40

11.58

86

7.78

283

1200

8270

6

150

6.625

168.3

0.134*

3.40

13.85

72

9.30

237

1000

6890

8

200

8.625

219.1

0.188**

4.78

25.26

40

16.96

130

800

5520

*    Schedule 10 Thickness
**   Not Schedule 10

CHEMICAL PROPERTIES


ELEMENT  ------>

Carbon

Manganese

Phosphorus

Sulphur

C

Mn

P

S

GRADE-A

0.25

0.95

0.035

0.035

GRADE-B

0.30

1.20

0.035

0.035


MECHANICAL PROPERTIES


PROPERTIES  ------>

Tensile Strength

Yield Strength

psi

MPa

psi

MPa

GRADE-A

48000

330

30000

205

GRADE-B

60000

415

35000

240


Min percent elongation in 2"(50mm) is   
     % El (Grade-A) = 56t + 16.5   
     % El (Grade-B) = 48t + 14   

     Where t = specified wall thickness (inch)

TOLERANCES

OUTSIDE DIAMETER


SIZE FROM

SIZE TO

TOLERANCE INCH(MM)

INCH (MM)

INCH (MM)

POSITIVE

NEGATIVE

3/4 (20)

1.1/2(40)

1/64 (0.40)

1/32 (0.80)

2 (50)

8 (200)

1% OF OD

1% OF OD


THICKNESS : 12.5% max under the nominal wall thickness.
WEIGHT :  +/-10% on calculated standard nominal weight.

HEAT TREATMENT
Weld seam of the ERW pipe in Grade-B shall be heat treated after welding to a minimum temperature of 10000F [5400C] so that no untempered martensite remains.

ZINC COATING
MINIMUM  : 1.30 oz / ft2 [400 Gm / Mtr2]
AVERAGE : 1.50 oz / ft2 [460 Gm / Mtr2]

FLATTENING TEST
STAGE-1 : For weld ductility until 2/3 of outside dia of specimen tube.
STAGE-2 : For ductility of steel until 1/3 of outside dia of specimen tube.
STAGE-3 : Full flattening for testing of laminated and unsound material.

MARKING :
Each pipe is stenciled as "JAZEERA STEEL OMAN, ASTM A135/A795 GR A / B-ERW SCH 10(or Thk-Inch) NPS-LENGTH-HEAT NO"

Gallery