Line pipes – seamless steel tubes for transportation of flammable fluids are mainly set for high pressure pipelines to deliver gases, oil and other flammable fluids in the mining, chemical and energy industry.
Tubes for casing and tubing are manufactured using the hot rolling process. Semi-finished product used for these tubes is continuously cast blooms. Tubes for casing and tubing are used in the mining industry to obtain crude oil and natural gas.
| OUTER DIAMETER (OD) | 10,3 – 114,3 mm (0,405 – 4,5 inch) |
| WALL THICKNESS (WT) | 1,7 – 13,5 mm (0,068 – 0,531 inch) |
| EUROPEAN STANDARDS | DIN 2448, EN ISO 3183, ISO 4200 |
| AMERICAN STANDARDS | API 5L, ASME B 36.10M |
| OUTER DIAMETER (OD) | 26,67 – 114,3 mm (1,05 – 4,5 inch) |
| WALL THICKNESS (WT) | 2,87 – 9,65 mm (0,113 – 0,38 inch) |
| AMERICAN STANDARDS | API 5CT |
| API 5CT | H40, J55, K55 and N80. |
Steel is made in the electric arc furnace and they are fully killed.
| EN ISO 3183 | PSL1 | L210, L245, L290, L320, L360, L390, L415 a L450. |
| PSL2 | L360NE alebo X52NE, L415NE alebo X60NE. | |
| API 5L | PSL1 | A, B, X42, X46, X52, X56, X60 a X65. |
Values for tubing – pumping tubes:
| Group 1: | 6,10–7,32 m (20–24 ft) |
| Skupina 2: | 8,53–9,75 m (28–32 ft) |
| Group 3: | 11,58–12,80 m (38–42 ft) |
Values for casing:
| Skupina 1: | 4,88–7,62 m (16–25 ft) |
| Group 2: | 7,62–10,36 m (25–34 ft) |
| Group 3: | 10,36–14,64 m (34–48 ft) |
Deburring applies to:
EN ISO 3183 and API Spec 5L [m]:
| nominal | minimal | average | maximal |
|---|---|---|---|
| 6 – SRL | 2.74 | 5.33 | 6.86 |
| 9 | 4.11 | 8.00 | 10.29 |
| 12 – DRL | 4.27 | 10.67 | 13.72 |
| 15 | 5.33 | 13.35 | 16.76 |
EN ISO 3183 and API Spec 5L [ft]:
| nominálna | minimal | average | maximal |
|---|---|---|---|
| 20.0 – SRL | 9.0 | 17.5 | 22.5 |
| 30.0 | 13.5 | 26.2 | 33.8 |
| 40.0 – DRL | 14.0 | 35.0 | 45.0 |
| 50.0 | 17.5 | 43.8 | 55.0 |
From 60.3 diameter beveled according to standards:
| DIN, EN | α = 40° – 60°, c = to 2 mm |
| ASME | α = 75° ± 5°, c = 1,6 ± 0,8 mm |
(a) tubes bound with a steel band,
(b) tubes wrapped in plastic sheets, burlap,
(c) tubes in wooden crates.
Tubes are bound with steel band into bundles with weight 1 000–3 500 kg.
Tubes are tested according to requirements of API 5CT standard, additional tests can be agreed when ordering the tubes.
D < 4 1/2 inch = ±0,79 mm (±0,031 inch)
D ≥ 4 1/2 inch = –0,5 % +1,0 % D
T = –12,5 % (+limited by weight)
Weight (1 tube) = –3,5 % +6,5 %
(a) marked with colored stripes on the tubes (tube bundles),
(b) marked with spray either by a white or black color using InkJet,
(c) marked by stamping the data (this applies to OD > 22 mm and WT >2.3 mm).
Bundles are marked with metal tag with required information
Tubes are tested according to requirements of the appropriate standards.
In all cases the tube leaking test is performed.
Tubes meet the directive requirements NACE MR 0175. covering resistance to acid environment (SSC – Sulfide Stress Cracking).
When ordering the tubes it is possible to agree upon the carbon content value (CEV).
Usually the tubes are supplied as hot rolled. Only tubes with DN 6 -10, perhaps tubes of other dimensions are supplied as cold drawn and after forming they are heat treated. This is done as per precious agreement.
The tube surface meets corresponds to the means of manufacturing.
The pipes are supplied without temporary anticorrosion protection.
While ordering, it is necessary to agree upon the method and means of temporarily protecting the surface of the tubes during transportation and storage.
Upon request the tubes may be plugged with plastic caps.
Are you interested in cooperation? Send us an inquiry, or order the goods directly from stock.
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