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Seamless carbon steel pipe API 5L line tube manufacturer Tianjin Yuantai Derun

Categories	LINE PIPE&OCTG
Brand	Yuantai Derun Steel Pipe Manufacturing Group
Model	ytdr-468
Brand	Yuantai Derun
Thickness	0.5-50mm or customized
OD	10.3-820mm
Length	0.5-24M or as client request
Surface	galvanized or painted
Certificate	CE,BV,PHD,EPD,ISO,LEED,BC1,JIS,API 5L,ASTM
Grade	Gr.A/B/C,S275,S355,S420,S460,X42,X52,X60,X65,X70
Delivery time	7-30 days
Supply Capacity	5 million tons per year
FOB port	Tianjin port
Terms of Payment	L/C, T/T
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Update Time	Dec 31,2024

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Seamless carbon steel pipe API 5L line tube manufacturer Tianjin Yuantai Derun

Seamless carbon steel pipe overview

Seamless carbon steel pipe is made from steel ingot or solid billet by piercing into a bristle pipe, and then made by hot rolling, cold rolling or cold dialing. Seamless carbon steel pipe has an important position in China's steel pipe industry.

Production process of seamless carbon steel pipe

The raw material of seamless carbon steel pipe is round tube blank, which needs to be cut and processed by a cutting machine into a billet with a length of about 1 meter, and then sent to the furnace for heating through a conveyor belt. The billet is fed into the furnace for heating, with a temperature of approximately 1200 degrees Celsius. The fuel is hydrogen or acetylene. Temperature control in the furnace is a crucial issue. After the round tube billet is discharged from the furnace, it needs to pass through a pressure piercing machine for piercing. The commonly used piercing machine is a conical roller piercing machine, which has high production efficiency, good product quality, large perforation and expansion capacity, and can pierce various steel grades. After perforation, the round tube blank is sequentially rolled, continuously rolled, or extruded by three rollers. After squeezing, the pipe needs to be detached and sized. The sizing machine uses a conical drill bit to rotate at high speed into the steel billet for drilling, forming a steel pipe. The inner diameter of the steel pipe is determined by the outer diameter length of the sizing machine drill bit. After the steel pipe is sized, it enters the cooling tower and is cooled by water spray. After cooling, the steel pipe needs to be straightened. After straightening, the steel pipe is transported by a conveyor belt to a metal inspection machine (or hydraulic test) for internal inspection. If there are cracks, bubbles, and other issues inside the steel pipe, they will be detected. After the quality inspection of steel pipes, strict manual selection is also required. After the quality inspection of the steel pipe, the number, specification, production batch number, etc. are sprayed with paint. And lifted into the warehouse by a crane.

Theoretical weight table for seamless carbon steel pipes

Outer diameter (mm)	Wall thickness (mm)
	16mm	17mm	18mm	19mm	20mm	22mm	24mm	25mm	26mm	28mm
	Theoretical weight (kg/m)
102mm	33.93	35.64	37.29	38.89	40.44	43.40	46.17	47.47	48.72	51.09
108mm	36.30	38.15	39.95	41.70	43.40	46.66	49.72	51.17	52.58	55.24
114mm	38.67	40.67	42.62	44.51	46.36	49.91	53.27	54.87	56.43	59.38
121mm	41.43	43.60	45.72	47.79	49.82	53.71	57.41	59.19	60.91	64.22
127mm	43.80	46.12	48.39	50.61	52.78	56.97	60.96	62.89	64.76	68.36
133mm	46.17	48.63	51.05	53.42	55.73	60.22	64.51	66.59	68.61	72.50
140mm	48.93	51.57	54.16	56.70	59.19	64.02	68.66	70.90	73.10	77.34
146mm	51.30	54.08	56.82	59.51	62.15	67.27	72.21	74.60	76.94	81.48
152mm	53.66	56.60	59.48	62.32	65.11	70.59	75.76	78.30	80.79	85.62
159mm	56.43	59.53	62.59	65.60	68.56	74.33	79.90	82.62	85.28	90.46
168mm	59.98	63.31	66.59	69.82	73.00	79.21	85.23	88.16	91.05	96.67
180mm	64.71	68.34	71.91	75.44	78.92	85.72	92.33	95.56	98.74	104.96
194mm	70.24	74.21	78.13	82.00	85.28	93.32	100.62	104.19	107.72	114.63
203mm	73.78	77.97	82.12	86.21	90.26	98.20	105.94	109.74	113.49	120.83
219mm	80.10	84.69	89.23	93.71	98.15	106.88	115.42	119.61	123.75	131.89
245mm	90.36	95.59	100.77	105.90	110.98	120.99	130.80	135.64	140.42	149.84
273mm	101.41	107.33	113.20	119.02	124.79	136.18	147.38	152.90	158.38	169.18

Chemical composition of seamless carbon steel pipes

Carbon C: 0.1-0.25%

Silicon Si: 0.5-0.80

Manganese Mn: 0.10-1.40

Sulfur S: allowable content ≤ 0.035%

Phosphorus P: allowable content ≤ 0.035%

Chromium Cr: 0.80-1.10

Molybdenum Mo: 1.25~2.50

Vanadium V: 0.07-1.2

Copper Cu: allowable content ≤ 0.30%

Performance parameter of seamless carbon steel pipes

Seamless carbon steel pipe: commonly used seamless steel pipe material with good toughness and plasticity, mainly used in general mechanical structures.

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