overview of Q195, Q235, and Q345 carbon steel seamless spiral welded Steel Pipe

Q195, Q235, and Q345 are three common grades of carbon steel used in the manufacturing of seamless spiral welded steel pipes for oil and gas pipelines. these pipes are essential for the transportation of Oil and Gas from production sites to refineries and distribution centers. In this article, we will provide an overview of these three grades and their properties, highlighting their importance in the oil and gas industry.

API 5ct  L80 casing Tubing range Lengths
	Range 1	Range 2	Range 3
CASING (PE/T and C/SF)
Total range length, inclusive Permissible variation, max a	4.88 to 7.62 1.83	7.62 to 10.36	10.36 to 14.63 1.83
		1.52
TUBING AND CASING USED AS TUBING
(PE/T and C/SF)
Total range length, inclusive Permissible variation, max a	6.10 to 7.32 b	8.53 to 9.75 c	11.58 to 12.80 d
	0.61	0.61	0.61
INTEGRAL TUBING connectionS (including IJ/PE
and IJ/SF)
Total range length, inclusive Permissible variation, max a	6.10 to 7.92 e	8.53 to 10.36	11.58 to 13.72 0.61
	0.61	0.61
pup jointS	Lengths: 0.61; 0.91; 1.22; 1.83; 2.44; 3.05 and 3.66 e
	tolerance: ±0.076
a Length variation applies to rail car shipment to the point of use and does not apply to order items of less than 18,144 kg of pipe.
b By agreement between purchaser and manufacturer, the maximum length may be increased to 8.57 m.
c By agreement between purchaser and manufacturer, the maximum length may be increased to 10.76 m.
d By agreement between purchaser and manufacturer, the maximum length may be increased to 17.72 m.0.61 m pup joints may be furnished up to 0.91 m long by agreement between purchaser and manufacturer, and lengths other than those listed may be furnished by agreement between purchaser and manufacturer.

Q195 is a chinese standard carbon structural steel grade, which has good overall mechanical properties, low temperature impact toughness, and excellent welding performance. It is widely used in the manufacturing of welded pipes, such as spiral welded steel pipes, due to its High strength and durability. Q195 pipes are known for their resistance to corrosion and are suitable for various applications in the oil and gas industry. GlasswareQ235 is another commonly used carbon steel grade in the production of seamless spiral welded steel pipes. It has similar properties to Q195 but with a slightly higher carbon content, which gives it increased strength and hardness. Q235 pipes are known for their excellent weldability and formability, making them ideal for use in oil and gas pipelines. They are also resistant to corrosion and can withstand high-pressure environments.

Q345 is a Chinese standard low alloy high strength structural steel grade. It has good mechanical properties, including yield strength, tensile strength, and impact toughness. Q345 pipes are widely used in the oil and gas industry due to their high strength and resistance to corrosion. They are suitable for applications that require high-pressure