Standard

ASME SA178/SA178M

Carbon Steel SA 178 Boiler Tube is general carbon steel supplied in the normalized condition. This alloy is processed from tempered, normalized and annealing process. These boilers are epitomized by having modest strength and impact toughness. These boilers are used where high-temperature services are required. These boilers are formed with between the temperatures 900 – 1200 degree C. The saturated times should be kept lower that prevents scaling. Moreover, time and temperature should be controlled.


These boilers have very good machinability; this reduces its machining costs. This alloy is resistive to corrosion in mild conditions. Moreover, these are resistive to pitting, crevice and stress corrosion cracking. These offer the best performance in elevated temperatures.


Product

Seamless Steel Pipe

ERW pipe

LSAW pipe

SSAW pipe

Casing and Tubing

O.D

13.72-914.4mm

21.3-660mm

406-1626mm

219-3500mm

Casing Size: 4-1/2' - 20' (114.3 mm - 508 mm)
Tubing Size: OD: 2-3/8' - 4-1/2' (60.3 mm - 114.3 mm)

W.T

1.25-50mm

1-20mm

6-60mm

5-26mm

0.205' - 0.635 mm; Length: R1 (4.88 m - 7.62 m), R2(7.62 m - 10.36 m), R3 (10.36 m - longer)

Unit Length

5.8/6/11.8/12m..etc

5.8/6/11.8/12m..etc

5.8/6/11.8/12m..etc

5.8/6/11.8/12m..etc


Material

GR.B, X42, X46, X52, S355JOH, S355J2H, St 44.0, P265GH, P235GH, P265TR1

GR.B, St 37, St 52, S235, X42, X46, X52, X56, X60, X65, X70

GR.B, St 37, St 52, S235, S355JRH, X42, X46, X52, X56, X60

GR.B, St 37, St 52, S235, X42, X46, X52, X56, X60, X65, X70

H40, J55, K55, N80, C75, L80, C90, T95, Q125

Usage

Chilled Water Pipe, Drinking water Pipe, Waste Water Pipe, Structural Tube, Fluid Pipe, Boiler Pipe, Oil and Gas Transportation Pipe, Mechanical Structure Pipe.

Low Pressure Liquid Delivery, such as water, gas and oil.

Low Pressure Liquid Delivery, such as water, gas and oil.

Low Pressure Liquid Delivery, such as water, gas and oil.

Conveying gas, water, oil, natural gas


Outside Diameter tolerance

Wall thickness tolerance

OD < 50

±0.05mm

S < 4mm

±12.5%

OD > 50

±1%

4–20mm

+15/-12.5%



S≥20mm

±12.5%


Chemical Requirements

Element

Composition, %

Grade A,
Low-Carbon Steel

Grade C,
Medium-Carbon Steel

Grade D,
Carbon-Man-ganese Steel

Carbon

0.06-0.18

0.35 max

0.27 max

Manganese

0.27-0.63

0.80 max

1.00-1.50

Phosphorus, max

0.035

0.035

0.030

Sulfur, max

0.035

0.035

0.015

Silicon

...

...

0.10 min


Mechanical Properties

Grade A

Grade C

Grade D

Tensile strength, min, ksi [MPa]

47[325]

60[415]

70[485]

Yield strength, min, ksi [MPa]

26[180]

37[255]

40[275]

Elongation in 2 in. or 50mm, min, %

35

30

30

For longitudinal strip tests a deduction for

1.50A

1.50A

1.50A

Each1⁄32-in[0.8mm] decrease in wall thickness below 5⁄16in. [8mm]

From the basic minimum elongation of the following percentage points shall be made



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