Blog Topic: Chinese High Quality Seamless steel Pipe
Chinese High Quality Seamless Steel Pipe Seamless steel pipes are an essential component in various industries, including Oil and gas, construction, and automotive. These pipes are known for their durability, strength, and resistance to corrosion. When it comes to high-quality seamless steel pipes, China is a leading manufacturer and supplier in the global market. China has a long history of producing steel pipes, and over the years, it has developed advanced manufacturing techniques and technologies. Chinese manufacturers have invested heavily in research and development to improve the quality of their products. As a result, Chinese seamless steel pipes are highly regarded for their superior quality and performance.Labels | Outside diameter (d/mm) | T&C (kg/m) | Wall thickness (t/mm) | Type of end-finish | |||||||
1 | 2 | J55/ K55 | M65 | L80/ R95 | N80-1/Q | C90/ T95 | P110 | Q125 | |||
4-1/2 | 9.50 | 114.30 | 14.14 | 5.21 | PS | PS | – | – | – | – | – |
10.50 | 114.30 | 15.63 | 5.69 | PSB | PSB | – | – | – | – | – | |
11.60 | 114.30 | 17.26 | 6.35 | PSLB | PLB | PLB | PLB | PLB | PLB | – | |
13.50 | 114.30 | 20.09 | 7.37 | – | PLB | PLB | PLB | PLB | PLB | – | |
15.10 | 114.30 | 22.47 | 8.56 | – | – | – | – | – | PLB | PLB | |
5 | 11.50 | 127.00 | 17.11 | 5.59 | PS | PS | – | – | – | – | – |
13.00 | 127.00 | 19.35 | 6.43 | PSLB | PSLB | – | – | – | – | – | |
15.00 | 127.00 | 22.32 | 7.52 | PSLB | PLB | SLB | PLB | PLB | PLB | ||
18.00 | 127.00 | 26.79 | 9.19 | – | PLB | SLB | PLB | PLB | PLB | PLB | |
21.40 | 127.00 | 31.85 | 11.10 | – | PLB | PLB | PLB | PLB | PLB | PLB | |
23.20 | 127.00 | 34.53 | 12.14 | – | – | PLB | PLB | PLB | PLB | PLB | |
24.10 | 127.00 | 35.87 | 12.70 | – | – | PLB | PLB | PLB | PLB | PLB | |
5-1/2 | 14.00 | 139.70 | 20.83 | 6.20 | PS | PS | – | – | – | – | – |
15.50 | 139.70 | 23.07 | 6.98 | PSLB | PSLB | – | – | – | – | – | |
17.00 | 139.70 | 25.30 | 7.72 | PSLB | PLB | PLB | PLB | PLB | PLB | – | |
20.00 | 139.70 | 29.76 | 9.17 | – | PLB | PLB | PLB | PLB | PLB | – | |
23.00 | 139.70 | 34.23 | 10.54 | – | PLB | PLB | PLB | PLB | PLB | PLB | |
26.80 | 139.70 | 39.88 | 12.70 | – | – | – | – | P | – | – | |
29.70 | 139.70 | 44.20 | 14.27 | – | – | – | – | P | – | – | |
32.60 | 139.70 | 48.52 | 15.88 | – | – | – | – | P | – | – | |
35.30 | 139.70 | 52.53 | 17.45 | – | – | – | – | P | – | – | |
38.00 | 139.70 | 56.55 | 19.05 | – | – | – | – | P | – | – | |
40.50 | 139.70 | 60.27 | 20.62 | – | – | – | – | P | – | – | |
43.10 | 139.70 | 64.14 | 22.22 | – | – | – | – | P | – | – | |
6-5/8 | 20.00 | 168.28 | 29.76 | 7.32 | PSLB | PSLB | – | – | – | – | – |
24.00 | 168.28 | 35.72 | 8.94 | PSLB | PLB | PLB | PLB | PLB | PLB | – | |
28.00 | 168.28 | 41.67 | 10.59 | – | PLB | PLB | PLB | PLB | PLB | – | |
32.00 | 168.28 | 47.62 | 12.06 | – | – | PLB | PLB | PLB | PLB | PLB | |
7 | 17.00 | 177.80 | 25.30 | 5.87 | – | – | – | – | – | – | – |
20.00 | 177.80 | 29.76 | 6.91 | PS | PS | – | – | – | – | – | |
23.00 | 177.80 | 34.23 | 8.05 | PSLB | PLB | PLB | PLB | PLB | – | – | |
26.00 | 177.80 | 38.69 | 9.19 | – | PLB | PLB | PLB | PLB | PLB | – | |
29.00 | 177.80 | 43.16 | 10.36 | – | PLB | PLB | PLB | PLB | PLB | – | |
32.00 | 177.80 | 47.62 | 11.51 | – | PLB | PLB | PLB | PLB | PLB | – | |
35.00 | 177.80 | 52.09 | 12.65 | – | – | PLB | PLB | PLB | PLB | PLB | |
38.00 | 177.80 | 56.55 | 13.72 | – | – | PLB | PLB | PLB | PLB | PLB | |
42.70 | 177.80 | 63.55 | 15.88 | – | – | – | – | P | – | – | |
46.40 | 177.80 | 69.05 | 17.45 | – | – | – | – | P | – | – | |
50.10 | 177.80 | 74.56 | 19.05 | – | – | – | – | P | – | – | |
53.60 | 177.80 | 79.77 | 20.62 | – | – | – | – | P | – | – | |
57.10 | 177.80 | 84.98 | 22.22 | – | – | – | – | P | – | – | |
7-5/8 | 24.00 | 193.68 | 35.72 | 7.62 | – | – | – | – | – | – | |
26.40 | 193.68 | 39.29 | 8.33 | PSLB | PSLB | PLB | PLB | PLB | – | – | |
29.70 | 193.68 | 44.20 | 9.52 | – | PLB | PLB | PLB | PLB | PLB | – | |
33.70 | 193.68 | 50.15 | 10.92 | – | PLB | PLB | PLB | PLB | PLB | – | |
39.00 | 193.68 | 58.04 | 12.70 | – | – | PLB | PLB | PLB | PLB | PLB | |
42.80 | 193.68 | 63.69 | 14.27 | – | – | PLB | PLB | PLB | PLB | PLB | |
45.30 | 193.68 | 67.42 | 15.11 | – | – | PLB | PLB | PLB | PLB | PLB | |
47.10 | 193.68 | 70.09 | 15.88 | – | – | PLB | PLB | PLB | PLB | PLB | |
51.20 | 193.68 | 76.20 | 17.45 | – | – | – | – | P | – | – | |
55.30 | 193.68 | 82.30 | 19.05 | – | – | – | – | P | – | – | |
7-3/4 | 46.10 | 196.85 | 68.61 | 15.11 | – | – | P | P | P | P | P |
8-5/8 | 24.00 | 219.08 | 35.72 | 6.71 | PS | PS | – | – | – | – | – |
28.00 | 219.08 | 41.67 | 7.72 | PS | – | – | – | – | – | ||
32.00 | 219.08 | 47.62 | 8.94 | PSLB | PSLB | – | – | – | – | – | |
36.00 | 219.08 | 53.58 | 10.16 | PSLB | PSLB | PLB | PLB | PLB | PLB | – | |
40.00 | 219.08 | 59.53 | 11.43 | – | PLB | PLB | PLB | PLB | PLB | – | |
44.00 | 219.08 | 65.48 | 12.70 | – | – | PLB | PLB | PLB | PLB | – | |
49.00 | 219.08 | 72.92 | 14.15 | – | – | PLB | PLB | PLB | PLB | PLB | |
9-5/8 | 32.30 | 244.48 | 48.07 | 7.92 | – | – | – | – | – | – | – |
36.00 | 244.48 | 53.58 | 8.94 | PSLB | PSLB | – | – | – | – | – | |
40.00 | 244.48 | 59.53 | 10.03 | PSLB | PSLB | PLB | PLB | PLB | – | – | |
43.50 | 244.48 | 64.74 | 11.05 | – | PLB | PLB | PLB | PLB | PLB | – | |
47.00 | 244.48 | 69.95 | 11.99 | – | PLB | PLB | PLB | PLB | PLB | PLB | |
53.50 | 244.48 | 79.62 | 13.84 | – | – | PLB | PLB | PLB | PLB | PLB | |
58.40 | 244.48 | 86.91 | 15.11 | – | – | PLB | PLB | PLB | PLB | PLB | |
59.40 | 244.48 | 88.40 | 15.47 | – | – | – | – | P | – | – | |
64.90 | 244.48 | 96.58 | 17.07 | – | – | – | – | P | – | – | |
70.30 | 244.48 | 104.62 | 18.64 | – | – | – | – | P | – | – | |
75.60 | 244.48 | 112.51 | 20.24 | – | – | – | – | P | – | – | |
10-3/4 | 32.75 | 273.05 | 48.74 | 7.09 | – | – | – | – | – | – | – |
40.50 | 273.05 | 60.27 | 8.89 | PSB | PSB | – | – | – | – | – | |
45.50 | 273.05 | 67.71 | 10.16 | PSB | PSB | – | – | – | – | – | |
51.00 | 273.05 | 75.90 | 11.43 | PSB | PSB | PSB | PSB | PSB | PSB | – | |
55.50 | 273.05 | 82.60 | 12.57 | – | PSB | PSB | PSB | PSB | PSB | – | |
60.70 | 273.05 | 90.33 | 13.84 | – | – | – | – | PSB | PSB | PSB | |
65.70 | 273.05 | 97.77 | 15.11 | – | – | – | – | PSB | PSB | PSB | |
73.20 | 273.05 | 108.94 | 17.07 | – | – | – | – | P | – | – | |
79.20 | 273.05 | 117.87 | 18.64 | – | – | – | – | P | – | – | |
85.30 | 273.05 | 126.94 | 20.24 | – | – | – | – | P | – | – | |
11-3/4 | 42.00 | 298.45 | 62.50 | 8.46 | – | – | – | – | – | – | – |
47.00 | 298.45 | 69.95 | 9.53 | PSB | PSB | – | – | – | – | – | |
54.00 | 298.45 | 80.36 | 11.05 | PSB | PSB | – | – | – | – | – | |
60.00 | 298.45 | 89.29 | 12.42 | PSB | PSB | PSB | PSB | PSB | PSB | PSB | |
65.00 | 298.45 | 96.73 | 13.56 | – | – | P | P | P | P | P | |
71.00 | 298.45 | 105.66 | 14.78 | – | – | P | P | P | P | P | |
13-3/8 | 48.00 | 339.72 | 71.43 | 8.38 | – | – | – | – | – | – | – |
54.50 | 339.72 | 81.11 | 9.65 | PSB | PSB | – | – | – | – | – | |
61.00 | 339.72 | 90.78 | 10.92 | PSB | PSB | – | – | – | – | – | |
68.00 | 339.72 | 101.20 | 12.19 | PSB | PSB | PSB | PSB | PSB | PSB | – | |
72.00 | 339.72 | 107.15 | 13.06 | – | – | PSB | PSB | PSB | PSB | PSB | |
16 | 65.00 | 406.40 | 96.73 | 9.53 | – | – | – | – | – | – | – |
75.00 | 406.40 | 111.62 | 11.13 | PSB | PSB | – | – | – | – | – | |
84.00 | 406.40 | 125.01 | 12.57 | PSB | PSB | – | – | – | – | – | |
109.00 | 406.40 | 162.21 | 16.66 | P | – | P | P | – | P | P | |
18-5/8 | 87.50 | 473.08 | 130.22 | 11.05 | PSB | PSB | – | – | – | – | – |
20 | 94.00 | 508.00 | 139.89 | 11.13 | PSLB | PSLB | – | – | – | – | – |
106.50 | 508.00 | 158.49 | 12.70 | PSLB | PSLB | – | – | – | – | – | |
133.00 | 508.00 | 197.93 | 16.13 | PSLB | – | – | – | – | – | – |
Applications: | For tubular heat exchangers,condensers,and similar heat transfer apparatuses. |
Size (mm): | O.D.: 6.0~168.0; W.T.: 1~15; L: max 12000 |
Tensile and Hardness Requirements | |||||||||
Grade | Yield strength MPa | Tensile Strength | Hardness a,c | Specified Wall Thickness | Allowable Hardness Variation b | ||||
Type | Total Elongation Under Load | min MPa | max | ||||||
min | max | HRC | HBW | mm | HRC | ||||
1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 |
H40 | — | 0.5 | 276 | 552 | 414 | — | — | — | — |
J55 | — | 0.5 | 379 | 552 | 517 | — | — | — | — |
K55 | — | 0.5 | 379 | 552 | 655 | — | — | — | — |
N80 | 1 | 0.5 | 552 | 758 | 689 | — | — | — | — |
N80 | Q | 0.5 | 552 | 758 | 689 | — | — | — | — |
R95 | — | 0.5 | 655 | 758 | 724 | — | — | — | — |
L80 L80 | 1 | 0.5 | 552 | 655 | 655 | 23 | 241 | — | — |
L80 | 9Cr 13Cr | 0.5 | 552 | 655 | 655 | 23 | 241 | — | — |
0.5 | 552 | 655 | 655 | 23 | 241 | — | — | ||
C90 | 1 | 0.5 | 621 | 724 | 689 | 25.4 | 255 | £12.70 | 3 |
12.71 to 19.04 | 4 | ||||||||
19.05 to 25.39 | 5 | ||||||||
³ 25.40 | 6 | ||||||||
T95 | 1 | 0.5 | 655 | 758 | 724 | 25.4 | 255 | £12.70 | 3 |
12.71 to 19.04 | 4 | ||||||||
19.05 to 25.39 | 5 | ||||||||
³ 25.40 | 6 | ||||||||
C110 | — | 0.7 | 758 | 828 | 793 | 30 | 286 | £12.70 | 3 |
12.71 to 19.04 | 4 | ||||||||
19.05 to 25.39 | 5 | ||||||||
³ 25.40 | 6 | ||||||||
P110 | — | 0.6 | 758 | 965 | 862 | — | — | — | — |
Q125 | 1 | 0.65 | 862 | 1034 | 931 | b | — | £12.70 | 3 |
12.71 to 19.04 19.05 | 4 | ||||||||
5 | |||||||||
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. |