ASME SA178 Heat Exchange Tube

SA178 heat exchanger tubes are electric resistance welded carbon steel tubes that comply with American standards. They are widely used in heat exchangers, boilers, and superheaters. Each SA178 heat exchanger tube undergoes chemical element testing, physical property testing, nondestructive testing, and third-party testing (upon customer request), ensuring the quality of welded pipes. GNEE Group has specialized in providing SA178 heat exchanger tubes for 16 years. Feel free to contact us if you have any requirements.

A178 Heat Exchange Tube Specification

Standard: ASTM A178, ASME SA178

Grade: GR.A, GR.C, GR.D

Outer Diameter: 6-114mm

Wall Thickness: 1-15mm

Length: Max 12000mm

A/SA 178 Heat Exchanger / Condenser Tubes Chemical Composition

Element	A/SA 178 Gr. A	A/SA 178 Gr. C	A/SA 178 Gr. D
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 max	0.035 max	0.030 max
S	0.035 max	0.035 max	0.015 max
Si	-	-	0.10 min

A/SA 178 Carbon Steel Heat Exchanger & Condenser Tubing Mechanical Properties

Element	A/SA 178 Grade A	A/SA 178 Grade C	A/SA 178 Grade D
Tensile Strength KSI (MPa)	47 (325)	60 (415)	70 (485)
Yield Strength KSI (MPa)	26 (180)	37 (255)	40 (275)
Elongation min. %	35	30	30

A178 Carbon Steel Condenser Tubes

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Eddy Current Testing (ECT) for A178 ERW heat exchanger tubes:

Eddy current testing (ECT) is a non-contact method used to inspect non-ferromagnetic components. This technique is suitable for detecting and quantifying discontinuities such as corrosion, erosion, wear, pitting, baffle cut notches, wall thickness loss, and cracks in non-ferrous metal materials.

Two coils are excited with electric currents to generate a magnetic field around them. This magnetic field penetrates the material of the tube, inducing alternating currents (eddy currents) in the material.
Any defect that alters the eddy currents also changes the impedance of the coils.

Changes in coil impedance are measured and used to detect defects within the tube.

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