The steel industry is undergoing a revolution, thanks to the introduction of seamless pipe technology. Seamless pipes are made from a single piece of metal, eliminating the need for Welding and other traditional methods of joining metal components. This technology has revolutionized the steel industry, providing a number of advantages over traditional methods.
Chemical Composition
C
Mn
P≤
S≤
Si≤
0.06-0.18
0.27-0.63
0.035
0.035
0.25
First, seamless pipes are much stronger than welded pipes. This is because the lack of welds eliminates weak points in the pipe, making it much more resistant to pressure and other external forces. This makes them ideal for use in high-pressure applications, such as in Oil and gas pipelines.
Second, seamless pipes are much more efficient to produce than welded pipes. This is because the process of making them requires fewer steps and less labor. This makes them much more cost-effective to produce, allowing steel manufacturers to pass on the savings to their customers.
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Labels a
Calculated Mass c
Nominal Linear Mass T& C b,c
Wall Thick- ness
em, Mass Gain or Loss Due to End Finishing d
Outside Diameter
Inside Diameter
Drift Diameter
Plain- end
kg
Round Thread
Buttress Thread
wpe
D
kg/m
t
D
mm
kg/m
Short
Long
RC
SCC
mm
mm
mm
1
2
3
4
5
6
7
8
9
10
11
12
13 3/8
48
339.72
71.43
8.38
322.96
318.99
68.48
15.04
—
— 17.91
—
13 3/8
54.5
339.72
81.1
9.65
320.42
316.45
78.55
13.88
—
16.44
—
13 3/8
61
339.72
90.78
10.92
317.88
313.91
88.55
12.74
—
14.97
—
13 3/8
68
339.72
101.19
12.19
315.34
311.37
98.46
11.61
—
14.97
—
13 3/8
68
339.72
101.19
12.19
315.34
311.37
98.46
11.67 f
—
14.33
—
13 3/8
72
339.72
107.15
13.06
313.6
311.15 e
105.21
10.98
—
13.98
—
13 3/8
72
339.72
107.15
13.06
313.6
311.15 e 309.63 309.63
105.21
10.91 f
—
14.33
—
13 3/8
72
339.72
107.15
13.06
313.6
105.21
10.98
—
13.98
—
13 3/8
72
339.72
107.15
13.06
313.6
105.21
10.91 e
—
—
16
65
406.4
96.73
9.53
387.4
382.57
96.73
18.59
—
— 20.13
—
16
75
406.4
111.61
11.13
384.1
379.37
108.49
16.66
—
18.11
—
16
84
406.4
125.01
12.57
381.3
376.48
122.09
14.92
—
—
—
16
109
406.4
162.21
16.66
373.1
368.3
160.13
—
—
—
18 5/8
87.5
473.08
130.21
11.05
450.98
446.22
125.91
33.6
—
39.25
—
20
94
508
139.89
11.13
485.7
480.97
136.38
20.5
27.11
24.78
—
20
94
508
139.89
11.13
485.7
480.97
136.38
20.61
27.26 g 24.27 17.84
24.78
—
20
106.5
508
158.49
12.7
482.6
477.82
155.13
18.22
22
—
20
133
508
197.93
16.13
475.7
470.97
195.66
13.03
16.02
—
NOTE See also Figures D.1, D.2, and D.3.
a Labels are for information and assistance in ordering.
b Nominal linear masses, threaded and coupled (Column 4) are shown for information only.
c The densities of martensitic chromium steels ( L80 Types 9Cr and 13Cr) are less than those of carbon steels; The masses shown are therefore not accurate for martensitic chromium steels; A mass correction factor of 0.989 shall be used.
d Mass gain or loss due to end finishing; See 8.5.
e Drift diameter for most common bit size; This drift diameter shall be specified in the purchase agreement and marked on the pipe; See 8.10 for drift requirements.
Finally, seamless pipes are much more aesthetically pleasing than welded pipes. This is because the lack of welds eliminates the need for grinding and other finishing processes, resulting in a much smoother surface. This makes them ideal for use in decorative applications, such as in architectural structures.
a In case of dispute, laboratory Rockwell C hardness testing shall be used as the referee method.
b No hardness limits are specified, but the maximum variation is restricted as a manufacturing control in accordance with 7.8 and 7.9.
c For through-wall hardness tests of Grades L80 (all types), C90, T95 and C110, the requirements stated in HRC scale are for maximum mean hardness number.
Overall, seamless pipe technology is revolutionizing the steel industry. It provides a number of advantages over traditional methods, making it much more efficient, reliable, and aesthetically pleasing. As a result, it is becoming increasingly popular among steel manufacturers and their customers.
Exploring the Benefits of Seamless Pipe for China Steel Suppliers and Steel Prices
First, seamless pipes are much stronger than welded pipes. This is because the lack of welds eliminates weak points in the pipe, making it much more resistant to pressure and other external forces. This makes them ideal for use in high-pressure applications, such as in Oil and gas pipelines.
Second, seamless pipes are much more efficient to produce than welded pipes. This is because the process of making them requires fewer steps and less labor. This makes them much more cost-effective to produce, allowing steel manufacturers to pass on the savings to their customers.
