ASTM B111 C68700 Copper Alloy Tube Bundle for Heat Exchanger

GNEE's ASTM B111 C68700 Copper Alloy Tube Bundles are manufactured in strict compliance with the ASTM B111 standard, offering customizable configurations to meet specific customer requirements. These tube bundles are typically available in the following specifications:

Outer Diameter: Generally ranging from 15 to 25 mm

Wall Thickness: Available from 0.5 to 1.2 mm

Length: Up to 6000 mm

Tube Bundle Arrangement: Available in straight tube or U-tube design

Each tube is produced with precise dimensional tolerances:

Outer Diameter Tolerance: ± 0.05 mm

Wall Thickness Tolerance: ± 10%

The tube bundles undergo rigorous quality control, including:

Eddy Current Testing (ECT) for detecting surface and near-surface defects

Hydrostatic Pressure Testing, capable of withstanding up to 1.5 times the design pressure

Material Certification (MTC) to verify alloy composition, mechanical properties, and corrosion resistance.

 

ASTM B111 C68700 Copper Alloy Tube Bundles exhibit exceptional resistance to seawater corrosion, biofouling, and erosion, with a corrosion rate of less than 0.01 mm/year in seawater. They also offer excellent weldability and formability, making them an ideal choice for use in:

Shipbuilding

Offshore platforms

Coastal power plants

Desalination plants

These tube bundles ensure reliable performance and durability in harsh marine environments, making them the preferred solution for heat exchangers in such demanding applications.

 

 

Equivalent Grade of C68700

Material Designation	Corresponding Material Symbol
	GB/T8890	ASTM B111	BS2871	JIS H3300	DIN1785
Aluminums Brass	HAL77-2	C68700	CZ110	C6870	CuZn20Al2

Chemical Composition

Tables 1 Chemical Composition

Designation	Chemical Composition %
	Cu	Sn	Al	As	Ni	Fe	Mn	Pb max.	Zn
C68700	76.0-79.0	–	1.8-2.5	0.02-0.06	–	0.06 max	–	0.07	Rem

Mechanical Properties

Tables 2 Tensile Requirements and Mechanical Properties

Copper or Copper Alloy UNS NO.	Temper Designation		Tensile Strength	Yield Strength	Elongation in 2 in.,
	Code	Former	min ksi(min MPa)	min ksi(min MPa)	min %
C68700	O61	annealed	50(345)	18(125)	---

 

ube Sizes for Heat Exchangers & Condensers & Boiler
Outside Diameter			BWG
		25	22	20	18	16	14	12	10
			Wall Thickness mm
		0.508	0.71	0.89	1.24	1.65	2.11	2.77	3.40
mm	inch		Weight kg/m
6.35	1/4	0.081	0.109	0.133	0.174	0.212
9.53	3/8	0.126	0.157	0.193	0.257	0.356	0.429
12.7	1/2		0.214	0.263	0.356	0.457	0.612	0.754
15.88	5/8		0.271	0.334	0.455	0.588	0.796	0.995
19.05	3/4		0.327	0.405	0.553	0.729	0.895	1.236
25.4	1		0.44	0.546	0.75	0.981	1.234	1.574	2.05
31.75	1 1/4		0.554	0.688	0.947	1.244	1.574	2.014	2.641
38.1	1 1/2		0.667	0.832	1.144	1.514	1.904	2.454	3.233
44.5	1 3/4				1.342	1.774	2.244	2.894	3.5
50.8	2				1.549	2.034	2.574	3.334	4.03
63.5	2 1/2				1.949	2.554	3.244	4.214	5.13
76.2	3				2.345	3.084	3.914	5.094	6.19
88.9	3 1/2				2.729	3.609	4.584	5.974	7.27
101.6	4					4.134	5.254	6.854	8.35
114.3	4 1/2					4.654	5.924	7.734	9.43

 

GNEE is a heat exchanger tube manufacturer in China. We supply standard, seamless ferritic and austenitic alloy steel and copper alloy boiler, superheater, and heat exchanger tubes for a wide range of applications. We manufacture seamless tubes from stainless steel billets through cold drawing and cold rolling, followed by heat treatment, to custom specifications. For specialized applications, we can also provide U-bends and bright annealed finished tubes upon request.
We specialize in manufacturing Shell & Tube Heat Exchangers, Oil Coolers, Steam Heaters, Air Preheaters, Cooling Towers, Cooling Equipment, Condensers, Air Receivers, Blast Furnace Oil Coolers, Hot Air Generators, Industrial Heat Exchangers, Evaporators, Heat Exchanger Coils, Radiators, Pressure Vessels, Wound Finned Tubes/Coolers, Extruded Finned Tubes, Rectangular/Square Finned Tubes, and all other heat transfer products. Email: info@gneestainless.com