Description
Seamless steel pipe, as the name suggests, is a pipe without a seam or a weld-joint. Seamless steel pipe is a tubular section or hollow cylinder, usually but not necessarily of circular cross-section, used mainly to convey substances which can flow — liquids and gases (fluids), slurries, powders and masses of small solids.
Standard: ASTM A106/A53/A500/ASME SA106/SA53/DIN1629/JIS G3444/G3445/G3452
Certificate: ISO 9001, ISO 14001, ISO 45001, CE
Out Diameter: 1/8 - 36inch (10.3-914.4mm)
Wall Thickness: 1.25 - 50mm
Length: Random Length, Fixed Length, SRL, DRL
Steel Grade:
ASTM A53/ASTM A106: GR A, GR B, GR CASME
ASME A500: GR.A, GR.B, GR.C, GR.D
Test Required:
Chemical Analysis, Mechanical Test, Visusal Inspection , Tension Test, Dimension Check, Bend Test , Flattenting Test, Impact Test, DWT Test, NDT Test, Hydrostatic Test, Hardness Test
Chemical Composition and Mechanical Properties
| Standard |
Grade |
Chemical Components (%) |
Mechanical Properties |
| |
|
C |
Si |
Mn |
P |
S |
Tensile STrength(Mpa) |
Yield STrength(Mpa) |
| ASTM A53 |
A |
≤0.25 |
- |
≤0.95 |
≤0.05 |
≤0.06 |
≥330 |
≥205 |
| |
B |
≤0.30 |
- |
≤1.2 |
≤0.05 |
≤0.06 |
≥415 |
≥240 |
| ASTM A106 |
A |
≤0.30 |
≥0.10 |
0.29-1.06 |
≤0.035 |
≤0.035 |
≥415 |
≥240 |
| |
B |
≤0.35 |
≥0.10 |
0.29-1.06 |
≤0.035 |
≤0.035 |
≥485 |
≥275 |
| ASTM A500 |
A |
≤0.26 |
- |
≤1.35 |
≤0.035 |
≤0.035 |
≥310 |
≥230 |
| |
B |
≤0.30 |
- |
≤1.40 |
≤0.045 |
≤0.045 |
≥400 |
≥290 |
| |
C |
≤0.23 |
- |
≤1.35 |
≤0.035 |
≤0.035 |
≥425 |
≥315 |
| |
D |
≤0.27 |
- |
≤1.40 |
≤0.045 |
≤0.045 |
≥400 |
≥250 |
Tolerances of carbon seamless steel pipe
| Pipe types |
Pipe sizes(mm) |
Tolerances |
| Hot rolled |
OD<50 |
±0.50mm |
| |
OD≥50 |
±1% |
| |
WT<4 |
±12.5% |
| |
WT 4～20 |
+15%, -12.5% |
| |
WT>20 |
±12.5% |
| Cold drawn |
OD 6～10 |
±0.20mm |
| |
OD 10～30 |
±0.40mm |
| |
OD 30～50 |
±0.45 |
| |
OD>50 |
±1% |
| |
WT≤1 |
±0.15mm |
| |
WT 1～3 |
+15%, -10% |
| |
WT >3 |
+12.5%, -10% |
| NOMINAL PIPE SIZE |
OD
(mm)
|
NOMINAL WALL THICKNESS
|
| DN |
NB(inch) |
ASME |
SCH10 |
SCH20 |
SCH30 |
STD |
SCH40 |
SCH60 |
XS |
SCH80 |
SCH100 |
SCH120 |
SCH140 |
SCH160 |
XXS |
| 15 |
1/2" |
21.3 |
2.11 |
|
2.41 |
2.77 |
2.77 |
|
3.73 |
3.73 |
|
|
|
4.78 |
7.47 |
| 20 |
3/4" |
26.7 |
2.11 |
|
2.41 |
2.87 |
2.87 |
|
3.91 |
3.91 |
|
|
|
5.56 |
7.82 |
| 25 |
1" |
33.4 |
2.77 |
|
2.9 |
3.38 |
3.38 |
|
4.55 |
4.55 |
|
|
|
6.35 |
9.09 |
| 32 |
1.1/4" |
42.2 |
2.77 |
|
2.97 |
3.56 |
3.56 |
|
4.85 |
4.85 |
|
|
|
6.35 |
9.7 |
| 40 |
1.1/2" |
48.3 |
2.77 |
|
3.18 |
3.68 |
3.68 |
|
5.08 |
5.08 |
|
|
|
7.14 |
10.15 |
| 50 |
2" |
60.3 |
2.77 |
|
3.18 |
3.91 |
3.91 |
|
5.54 |
5.54 |
|
|
|
8.74 |
11.07 |
| 65 |
2.1/2" |
73 |
3.05 |
|
4.78 |
5.16 |
5.16 |
|
7.01 |
7.01 |
|
|
|
9.53 |
14.02 |
| 80 |
3" |
88.9 |
3.05 |
|
4.78 |
5.49 |
5.49 |
|
7.62 |
7.62 |
|
|
|
11.13 |
15.25 |
| 90 |
3.1/2" |
101.6 |
3.05 |
|
4.78 |
5.74 |
5.74 |
|
8.08 |
8.08 |
|
|
|
|
|
| 100 |
4" |
114.3 |
3.05 |
|
4.78 |
6.02 |
6.02 |
|
8.56 |
8.56 |
|
11.13 |
|
13.49 |
17.12 |
| 125 |
5" |
141.3 |
3.4 |
|
|
6.55 |
6.55 |
|
9.53 |
9.53 |
|
12.7 |
|
15.88 |
19.05 |
| 150 |
6" |
168.3 |
3.4 |
|
|
7.11 |
7.11 |
|
10.97 |
10.97 |
|
14.27 |
|
18.26 |
21.95 |
| 200 |
8" |
219.1 |
3.76 |
6.35 |
7.04 |
8.18 |
8.18 |
10.31 |
12.7 |
12.7 |
15.09 |
18.26 |
20.62 |
23.01 |
22.23 |
| 250 |
10" |
273 |
4.19 |
6.35 |
7.8 |
9.27 |
9.27 |
12.7 |
12.7 |
15.09 |
18.26 |
21.44 |
25.4 |
28.58 |
25.4 |
| 300 |
12" |
323.8 |
4.57 |
6.35 |
8.38 |
9.53 |
10.31 |
14.27 |
12.7 |
17.48 |
21.44 |
25.4 |
28.58 |
33.32 |
25.4 |
| 350 |
14" |
355.6 |
6.35 |
7.92 |
9.53 |
9.53 |
11.13 |
15.09 |
12.7 |
19.05 |
23.83 |
27.79 |
31.75 |
35.71 |
|
| 400 |
16" |
406.4 |
6.35 |
7.92 |
9.53 |
9.53 |
12.7 |
16.66 |
12.7 |
21.44 |
26.19 |
30.96 |
36.53 |
40.19 |
|
| 450 |
18" |
457.2 |
6.35 |
7.92 |
11.13 |
9.53 |
14.27 |
19.05 |
12.7 |
23.83 |
39.36 |
34.93 |
39.67 |
45.24 |
|
| 500 |
20" |
508 |
6.35 |
9.53 |
12.7 |
9.53 |
15.09 |
20.62 |
12.7 |
26.19 |
32.54 |
38.1 |
44.45 |
50.01 |
|
| 550 |
22" |
558.8 |
6.35 |
9.53 |
12.7 |
9.53 |
|
22.23 |
12.7 |
28.58 |
34.93 |
41.28 |
47.63 |
53.98 |
|
| 600 |
24" |
609.6 |
6.35 |
9.53 |
14.27 |
9.53 |
17.48 |
24.61 |
12.7 |
30.96 |
38.89 |
46.02 |
52.37 |
59.54 |
|
| 650 |
26" |
660.4 |
7.92 |
12.7 |
|
9.53 |
|
|
12.7 |
|
|
|
|
|
|
| 700 |
28" |
711.2 |
7.92 |
12.7 |
15.88 |
9.53 |
|
|
12.7 |
|
|
|
|
|
|
| 750 |
30" |
762 |
7.92 |
12.7 |
15.88 |
9.53 |
|
|
12.7 |
|
|
|
|
|
|
| 800 |
32" |
812.8 |
7.92 |
12.7 |
15.88 |
9.53 |
17.48 |
|
12.7 |
|
|
|
|
|
|
| 850 |
34" |
863.6 |
7.92 |
12.7 |
15.88 |
9.53 |
17.48 |
|
12.7 |
|
|
|
|
|
|
| 900 |
36" |
914.4 |
7.92 |
12.7 |
15.88 |
9.53 |
19.05 |
|
12.7 |
|
|
|
|
|
|
Standard
| ASTM A53 |
Standard Specification for Pipe, Steel, Black and Hot-Dipped, Zinc-Coated, Welded and Seamless |
| ASTM A106 |
Standard Specification for Seamless Carbon Steel Pipe for High-Temperature Service |
| ASTM A500 |
Specification for Cold-Formed Welded and Seamless Carbon Steel Structural Tubing in Rounds and Shapes |
Hot Rolling Seamless Steel Line Pipe Manufacturing / Production processes
Rolled Round Billets – Examination – Cut Off – Heating – Piercing – Elongation – Slight Tension Reducing – Straightening – Corp End Cutting Off – Visual Inspection – NDT – Hydrostatic Test – Ends Procession – Product Inspection – Painting and Marking – Packing – Warehousing
Cold Drawn (Rolled) seamless steel pipe manufacturing process
Mother pipe (Normally for hot rolled pipe) – Inspection – Annealing – Ends Treatment (Hitting and Drilling hole) – Pickling – Grinding – Phosphorization (Annoit) – Cold Drawn (Rolled) – Degreasing and Cleaning – Heat treatment (Solution treatment) – Straightening – Hydrostatic test – Painting and Marking – Warehousing
Process
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