Our factory's pipe made by cold rolled steel strip, straight welded by high frequency pipe making machine, used in Furniture Industry, Salvage Industry, Tourism Industry, Fitness Apparatus Industry and Municipal Construction Projects.

Cold Rolled High Frequency Straight Welded Round Pipe
Executive Standard: ASTM, DIN, JIS, GB
Grade: Q195-Q235

Product	Outside Diameter		Thickness
	Inches	MM	Inches	MM
Black annealed pipes	0.3150-3.9370	10-100	0.0118-0.0787	0.3-2.0
Bright pipes	0.3150-3.9370	10-100	0.0118-0.0787	0.3-2.0
Pre-galvanlized pipes	0.3150-3.9370	10-100	0.0118-0.0787	0.3-2.0
Cold hard pipes	0.3150-3.9370	10-100	0.0118-0.0787	0.3-2.0

Cold Rolled High Frequency Straight Welded Square Pipe
Executive Standard: ASTM, DIN, JIS, GB
Grade: Q195-Q235

Product	Outside Diameter		Thickness
	Inches	MM	Inches	MM
Black annealed pipes	0.3937²-2.3622²	10²-60²	0.0118-0.0787	0.3-2.0
Bright pipes	0.3937²-2.3622²	10²-60²	0.0118-0.0787	0.3-2.0
Pre-galvanlized pipes	0.3937²-2.3622²	10²-60²	0.0118-0.0787	0.3-2.0
Cold hard pipes	0.3937²-2.3622²	10²-60²	0.0118-0.0787	0.3-2.0

Cold Rolled High Frequency Straight Welded Rectangler Pipe
Executive Standard: ASTM, DIN, JIS, GB
Grade: Q195-Q235

Product	Outside Diameter		Thickness
	Inches	MM	Inches	MM
Black annealed pipes	0.2362*0.3937-1.9685*3.9370	6*10-50*100	0.0118-0.0787	0.3-2.0
Bright pipes	0.2362*0.3937-1.9685*3.9370	6*10-50*100	0.0118-0.0787	0.3-2.0
Pre-galvanlized pipes	0.2362*0.3937-1.9685*3.9370	6*10-50*100	0.0118-0.0787	0.3-2.0
Cold hard pipes	0.2362*0.3937-1.9685*3.9370	6*10-50*100	0.0118-0.0787	0.3-2.0

Cold Rolled High Frequency Straight Welded Window Section Pipe
Executive Standard: ASTM, DIN, JIS, GB
Grade: Q195-Q235

Product	Outside Diameter		Thickness
	Inches	MM	Inches	MM
Black annealed pipes	T/Z/L 0.9843-1.4960	T/Z/L 25-38	0.0236-0.0787	0.6-2.0
Bright pipes	T/Z/L 0.9843-1.4960	T/Z/L 25-38	0.0236-0.0787	0.6-2.0
Pre-galvanlized pipes	T/Z/L 0.9843-1.4960	T/Z/L 25-38	0.0236-0.0787	0.6-2.0
Cold hard pipes	T/Z/L 0.9843-1.4960	T/Z/L 25-38	0.0236-0.0787	0.6-2.0

Cold rolled steel is metal that has been made by rolling. When they cold roll steel, it is to get a better finish or more strength. Cold rolled steel is made by passing the steel through a number of rollers after the metal has cooled from initial production. The steel is reduced in thickness incrementally as it passes through the rollers. Cold rolled steels tend to have lower carbon content than hot rolled steels, making them more durable. They can also be rolled to more specific dimensions due to the lack of shrinkage that occurs with hot rolled steels. Cold rolled steels are typically rolled to have a matte appearance. They may also be painted, if it is called for, by removing the lubricants that are frequently applied prior to shipping.