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  • Carbon seamless steel pipe,API  pipe,Structural steel pipe
  • Carbon seamless steel pipe,API  pipe,Structural steel pipe
  • Carbon seamless steel pipe,API  pipe,Structural steel pipe
  • Carbon seamless steel pipe,API  pipe,Structural steel pipe

ASTM A178 Boiler tube

Type:ASTM A178Boiler tube

Size:

OD: 6mm-168mm

WT:  1mm-12mm

Length: 0.5mtr-20mtr

Standard & Grade:ASTM A178

Ends:Square Ends/Plain Ends (straight cut, saw cut, torch cut), Beveled/Threaded Ends

Packing:Bundle or bulk , wooden case or other seaworthy packing or for the client's requirement

Usage:Standard Specification for Electric-Resistance-Welded Carbon Steeland Carbon-Manganese Steel Boiler and Superheater Tubes.



  • Description
  • Specification
  • Standard
  • Process
  • Packing

Boiler tubing is used in these industries:

steam Boilers
Power Generation

Fossil Fuel Plants

Electric Power Plants
Industrial Processing Plants

Cogeneration Facilities

Boiler tubes need to withstand high pressure and temperature.


ASTM A178 tubes are a kind of frequently-used tubes in our life, they are mainly used in manufacturing heating pipelines, containers, coal-saving devices, superheaters, arch superheated tube, airway tube etc.



Outside diameter and Wall thickness tolerance

Outside Diameter tolerance

Wall thickness tolerance

OD < 50

±0.05mm

S < 4mm

±12.5%

OD > 50

±1%

4--20mm

-120



S≧20mm

±12.5%


ASTM A178 / A178M Standard Specification for Electric-Resistance-Welded Carbon Steel and Carbon-Manganese Steel Boiler and Superheater Tubes. ASTM A178 standard refers to electric-resistance-welded tubes with minimum-wall-thickness. Materials are carbon steel and carbon-manganese steel, ASTM A178 pipe and tube is to be used in boiler tubes, boiler flues, superheater flues and safe ends.


Chemical Requirements

Element

Grade A

Grade C

Grade D

%

Low carbon steel

Medium Carbon Steel

Manganess Steel

C

0.06-0.18

0.35 Max

0.27 Max

Mn

0.27-0.63

0.80 Max

1.00-1.50

P

0.035

0.035

0.03

S

0.035

0.035

0.015

Si

...

...

0.10 Min.


Tensile Requirements

Grade C and D tubes shall conform to the requirements as to tensile properties

Data

GradeC

GradeD

Tensilestrength,min,ksi[MPa]

60[415]

70[485]

Yieldstrength,min,ksi[MPa]

37[255]

40[275]

Elongationin2in.or50mm,min,%

30

30

For longitudinal strip tests a deduction for Each1⁄32-in[0.8mm]decreaseinwallthicknessbelow5⁄16in.[8mm]

1.50A

1.50A


The actual mean wall is defined as the average of the thickest and thinnest wall in that section.

Welded tubes65 %

Type

Over

Under

Welded Tubes

0.18

0


Mechanical Property:

Grade C & Grade D tubes shall conform to the requirements -tensile properties prescribed below:

Type

Over

Under

Welded Tubes

0.18

0


Application Industries

A178 Boiler Pipes & Tubes are used in boiler, superheater, heat-exchanger and pressure equipment in Petrochemical factory, Refinery factory, sugar mill, power plant, power plant, shipbuilding.Used in boiler, superheater, heat-exchanger and pressure equipment in Petrochemical factory, Refinery factory, sugar mill, power plant, power plant, shipbuilding.