overview of DIN2391 st37.4 St45 St52 seamless steel Tube

The DIN2391 St37.4 St45 St52 seamless steel tube is a widely used product in various industries, particularly in the oil and gas sector. This article aims to provide an overview of this seamless steel tube, highlighting its key features and applications.

One of the main advantages of the DIN2391 St37.4 St45 St52 seamless steel tube is its cold rolled and cold drawn manufacturing process. This process ensures that the tube has a smooth and precise finish, with tight dimensional tolerances. As a result, the tube exhibits excellent mechanical properties, such as High strength and durability.

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.

Kalmar Reach Stacker Oil TubeThe seamless nature of this steel tube also contributes to its superior performance. Unlike welded tubes, seamless tubes do not have any joints or seams, which eliminates the risk of Leakage or failure at these points. This makes the DIN2391 St37.4 St45 St52 seamless steel tube highly reliable and suitable for applications that require high pressure and tight Sealing, such as oil pressure tubes. Furthermore, the DIN2391 St37.4 St45 St52 seamless steel tube is often annealed after the cold rolling and drawing process. Annealing involves heating the tube to a specific temperature and then slowly cooling it, which helps to relieve internal stresses and improve the tube’s overall structure. This annealing process enhances the tube’s mechanical properties, making it more resistant to deformation and cracking. In terms of material composition, the DIN2391 St37.4 St45 St52 seamless steel tube is primarily made