ASTM A178 Welded Steel Boiler Tube

A178 steel pipes are electric-resistance-welded carbon steel and carbon-manganese steel boiler and superheater tubes. A178 welded pipes come in three grades: GRA, GRC, and GRD. The dimensions and thickness of A178 pipes typically range from an outer diameter of 1/2 to 5 inches and an inner diameter of 0.035 to 0.360 inches. The minimum wall thickness is from 0.035 to 0.360 inches. As a globally renowned steel supplier, GNEE Group can provide a variety of steel pipes for you. If you have other needs, please feel free to contact us.

A178 Resistance Welded Steel Tube Specification

Standard	ASTM A178, ASME SA178
Grade	Grade A, Grade C, Grade D
Technique	ERW Pipe
OD	12.7mm to 127mm
Wall thickness	1.5mm to 6.0mm
Length	6m-25m
Ends	Plain ends or bevel ends

A178 Welded Steel Pipe Chemical Composition

Element	Grade A	Grade C	Grade D
	Low carbon steel	Medium carbon steel	Manganess steel
C%	0.06-0.18	0.35Max	0.27Max
Mn%	0.27-0.63	0.80Max	1.00-1.50
P%	0.035	0.035	0.030
S%	0.035	0.035	0.015
Si%	.....	.....	0.10Min

A178 ERW Steel Pipe Mechanical Propertise

	Grade A	Grade C	Grade D
Tensile Strength loading Ksi (Mpa)	=47(325)	60(415)	70(485)
Yield Strength Loading Ksi(Mpa)	=26(180)	37(255)	40(275)
Elongation (50mm)%	=35	=30	=30

A178 ERW Tube

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Other A178 Pipe for Sale

A178 Carbon Manganese Steel Boiler Tubes	A178 Superheater Tubes
A178 Heat-exchanger Tube	A178 Condenser steel tube
A178 Low Carbon Steel Pipe	A178 Medium Carbon Steel Pipe
A178 ERW carbon Steel Pipes	A178 ERW Pipe

GNEE Pipe Test

• Visual Inspection

Visual inspection is the foundation of steel pipe quality assessment. Inspectors need to check whether the surface of the steel pipe is smooth and free of cracks, rust, and other defects. They also need to verify whether the dimensions and wall thickness of the steel pipe meet the design requirements.

• Mechanical Properties Testing

Mechanical properties testing is a crucial step in determining the quality of steel pipes. This includes tensile testing, bending testing, and impact testing. Tensile testing is used to assess the strength and ductility of the steel pipe, bending testing evaluates its ductility and toughness, and impact testing checks the pipe's toughness at low temperatures. Additionally, tests for fatigue performance and wear resistance may be conducted depending on the application requirements.

• Chemical Composition Testing

Chemical composition testing is another key aspect of assessing steel pipe quality. This testing ensures that the chemical composition of the steel pipe meets design specifications. Common methods for chemical composition testing include spectroanalysis and X-ray fluorescence analysis. These techniques can quickly and accurately determine the chemical composition of the steel pipe, providing a basis for quality evaluation.

• Non-Destructive Testing

Non-destructive testing (NDT) involves evaluating the internal defects and mechanical properties of steel pipes without damaging their structure. GNEE employs various NDT methods, including ultrasonic testing, radiographic testing, and magnetic particle testing. These methods can detect internal defects such as cracks, pores, and slag inclusions, thereby improving the accuracy and completeness of the inspection.

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