EN 10208 carbon steel pipes are designed for transporting gas, oil, and other combustible fluids under specific pressures in industries such as mining, chemical processing, and power engineering.
The pipes are manufactured with the diameters between 21,3 – 660 mm and with the wall thickness of up to 40 mm in the case of hot rolled seamless pipes, and with the diameters between 10,2 – 108 and with the wall thickness of up to 10 mm in the case of cold drawn seamless pipes.
The pipes are utilised for transporting gas, oil, combustible fluids with certain stress inside the mining, chemical, and power engineering sector.
The pipes are manufactured with all the diameters amongst 21,3 - 660 mm and using the wall thickness of as much as 40 mm within the case of hot rolled seamless pipes, and with all the diameters between 10,2 - 108 and together with the wall thickness of as much as ten mm inside the case of cold drawn seamless pipes.
seamless steel pipes and welded steel pipes.
Steel grades used requirement class A
BS EN 10208-2 is the European regular that specifies the technical delivery conditions for seamless and welded steel pipes for the on land transport of combustible fluids mostly in gas provide systems but excluding pipeline applications inside the petroleum and all-natural gas industries. It consists of far more stringent quality and testing needs than those in BS EN 10208-1.
Steel pipes for pipeline transportation systems inside the petroleum and natural gas industries are covered by ISO 3183. BS EN 10208-2 specifies products with the identical (and additional) strength levels and partly related (but not identical) specifications as EN 10208-1 and EN 10208-2 and is with two extra annexes specifying deviating or extra needs also published as API Spec 5L.
| Pipe type | Original material | Plastic forming of the pipe1) | Thermal processing state | Thermal processing symbol |
|---|---|---|---|---|
| Seamless (S) | Ingot or block | Hot rolling | Normalization or normalization plastic forming | N |
| Heat treatment | Q | |||
| Hot rolling and cold finishing | Normalization | N | ||
| Heat treatment | Q | |||
| High frequency welding (HFW) | Normalized rolled strips | Cold forming | Normalization of the weld area | N |
| Thermomechanically rolled strips | Heat treated weld area | M | ||
| Hot rolled strips or normalized rolled strips | Cold forming and reduction with hot tensioning at controlled temperature so as to achieve a normalized state | Normalization (whole pipe) | N | |
| - | N | |||
| Submerged arc welding (SAW) -longitudinal (SAWL) -spiral (SAWH) or combined welding (COW) -longitudinal (COWL) –spiral (COWH_ | Normalized or normalized rolled sheets or strips | Cold forming | - | N |
| Thermomechanically rolled sheets or strips | ||||
| Rolled sheets or strips | Normalization plastic forming | - | M | |
| Normalized or normalized rolled sheets or strips | N |
| Steel designation | Maximum content, % | CEV max. | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Steel symbol | C | Si | Mn | P | S | V | Nb | Ti | Other | |
| Steels for seamless and welded pipes | ||||||||||
| L245NB L290NB L360NB L415NB |
0,16 0,17 0,20 0,21 |
0,40 0,40 0,45 0,45 |
1,1 1,2 1,6 1,6 |
0,025 0,025 0,025 0,025 |
- 0,05 0,10 0,15 |
- 0,05 0,10 0,15 |
- 0,05 0,05 0,05 |
- 0,04 0,04 0,04 |
0,42 0,42 0,42 0,45 to be negotiated |
|
| Steels for seamless pipes | ||||||||||
| L360QB L415QB L450QB L485QB L555QB |
0,16 0,16 0,16 0,16 0,16 |
0,45 0,45 0,45 0,45 0,45 |
1,4 1,6 1,6 1,7 1,8 |
0,025 0,025 0,025 0,025 0,025 |
0,020 0,020 0,020 0,020 0,020 |
0,05 0,08 0,09 0,10 0,10 |
0,05 0,05 0,05 0,05 0,06 |
0,04 0,04 0,06 0,06 0,06 |
0,42 0,43 0,45 0,45 to be negotiated |
|
| Steels for welded pipes | ||||||||||
| L245MB L290MB L360MB L415MB L450MB L485MB L555MB |
0,16 0,16 0,16 0,16 0,16 0,16 0,16 |
0,45 0,45 0,45 0,45 0,45 0,45 0,45 |
1,5 1,5 1,6 1,6 1,6 1,7 1,8 |
0,025 0,025 0,025 0,025 0,025 0,025 0,025 |
0,020 0,020 0,020 0,020 0,020 0,020 0,020 |
0,04 0,04 0,05 0,08 0,10 0,10 0,10 |
0,4 0,4 0,5 0,5 0,5 0,6 0,6 |
- - 0,04 0,06 0,06 0,06 0,06 |
0,40 0,40 0,41 0,42 0,43 0,43 to be negotiated |
|
| Steel designation | Pipe body (seamless pipe and welded pipe) | Spiral weld | Whole pipe | ||||
|---|---|---|---|---|---|---|---|
| HFW, SAW, COW | SAW, COW | ||||||
| Steel symbol | Plastic limit R 10,5N/mm 2 | Tensile strength R mN/mm 2min. | R10,5/RmMax | Elongation A% min. | Tensile strength R mN/mm 2min | Diameter of the bending mandrel bar in the bending test | Pressure water test |
| L245NB L245MB |
245 to 440 | 415 | 0,80 0,85 |
22 | The same values as for the pipe body apply | 3T | Every pipe should be subject to the test and it should be free of any leaks or deformations |
| L290NB L290MB |
290 to 440 | 415 | 0,85 0,85 |
21 | 3T | ||
| L360NB L360QB L360MB |
360 to 510 | 460 | 0,85 0,88 0,85 |
20 | 4T | ||
| L415NB L415QB L415MB |
415 to 565 | 520 | 0,85 0,88 0,85 |
18 | 5T | ||
| L450QB L450MB |
450 to 570 | 535 | 0,90 0,87 |
18 | 6T | ||
| L485QB L485MB |
485 to 605 | 570 | 0,90 0,90 |
18 | 6T | ||
| L555QB L555MB |
555 to 675 | 625 | 0,90 0,90 |
18 | 6T | ||
It was the intention, when preparing this document, to avoid specifying the high-quality of line pipe to become utilised to get a certain application. Nonetheless, it was recognized that there are actually several high quality levels commonly made use of, and it was decided to reflect these inside the common by the differentiation involving two high-quality levels.
Firstly, the need was recognized to supply a standard top quality level. This really is designated requirement class A and considered in BS EN 10208-1.
Secondly, a lot of purchasers impose needs extra towards the basic regular, as an illustration concerning toughness and non-destructive inspection. This method is popular, as an example, for transmission pipelines.
Such enhanced needs are addressed in requirement class B and regarded in BS EN 10208-2.
For offshore applications and also other applications outside the scope of BS EN 10208-1 and BS EN 10208-2, other requirements may perhaps be applicable, e.g. ISO 3183.
The Charpy impact power needs within this document happen to be derived from established data, in accordance with EPRG recommendations, and are intended to prevent the occurrence of extended running shear fracture in pipelines transporting clean, dry natural gas. It truly is the duty from the designer to determine irrespective of whether these energy requirements suffice for the intended application. One example is, rich gas or two-phase fluids may well need additional testing to become carried out.
For pipes of requirement class B, a weld efficiency issue of 1,0 might be utilized in design calculations, because of the conditions specified for the manufacture of the pipes and for the testing with the tubes.
The selection of the requirement class will depend on lots of components: the properties in the fluid to be conveyed, the service conditions, design and style code and any statutory requirements must all be taken into consideration. BS EN 10208-2 provides no detailed suggestions. It is actually the ultimate duty of the user to choose the appropriate requirement class for the intended application.
This document combines a wide array of item varieties, dimensions and technical restrictions in accordance with the functional specifications for gas supply systems referred to in BS EN 1594 Gas provide systems. Pipelines for maximum operating pressure more than 16 bar. Functional needs.
DIN steel heat exchanger tubes, meeting German Industrial Standards, are constructed from high-temperature and corrosion-resistant steel, specifically designed for efficient heat exchange applications.
With years of expertise, we provide a wide range of steel tube processing services. From basic sawing and machining to complex bending and upsetting operations, we support you at every stage of your project.
Our capabilities include eccentricity reduction and concentricity improvement through turning and grinding. We specialize in creating complex geometries using rotary swaging and axial forming, and offer property modifications through partial heat treatment to meet your exact requirements.
Alloy steel pipes are widely used in high-temperature, high-pressure and corrosive service environments where conventional carbon steel pipes cannot provide sufficient mechanical strength or long-term reliability.
Manufactured from premium alloy steels containing chromium, molybdenum, nickel and other alloying elements, these pipes provide excellent resistance to heat, pressure, oxidation and corrosion, making them ideal for demanding industrial processes.
Alloy steel pipes offer superior performance under severe operating conditions. Their enhanced mechanical properties provide excellent resistance to elevated temperatures, internal pressure, corrosion and long-term creep deformation.
Alloy steel pipes are selected for critical applications where operating temperatures, pressures or corrosive media exceed the capabilities of carbon steel.
| Service Condition | Typical Application |
|---|---|
| High Temperature | Boilers, superheaters, steam headers |
| Low Temperature | Cryogenic processing systems |
| High Pressure | Power generation and process piping |
| Corrosive Media | Chemical and petrochemical plants |
| Long-Term Creep Service | Thermal power stations |
| Product Type | Common Standards |
|---|---|
| Seamless Pipes | ASTM A335 P1, P5, P9, P11, P22, P91 |
| Butt Weld Fittings | ASTM A234 WP1, WP5, WP9, WP11, WP22, WP91 |
| Forged Fittings & Flanges | ASTM A182 F1, F5, F9, F11, F22, F91 |
Sunny Steel supplies alloy steel piping products to customers worldwide across a wide range of industrial sectors. Our products are manufactured to international standards and are trusted in critical piping systems requiring long-term reliability.
Steel pipe delivery status(condition): cold / hard (BK), cold / soft (BKW), after cold stress relief annealing (BKS), annealing (GBK), normalized (NBK).
| Term | Symbol | Explanation |
|---|---|---|
| Cold-finished/hard (cold-finished as-drawn) | BK | No heat treatment after the last cold-forming process. The tubes therefore have only low deformability. |
| Cold-finished/soft (lightly cold-worked) | BKW | After the last heat treatment there is a light finishing pass (cold drawing). With proper subsequent processing, the tube can be cold-formed (e.g. bent, expanded) within certain limits. |
| Annealed | GBK | After the final cold-forming process the tubes are annealed in a controlled atmosphere or under vacuum. |
| Normalized | NBK | The tubes are annealed above the upper transformation point in a controlled atmosphere or under vacuum. |
The general cold strip mills, volume should go through continuous annealing (CAPL unit) to eliminate cold hardening and rolling stress, or batch annealing reach the mechanical properties of the corresponding standard specifies. Cold rolled steel surface quality, appearance, dimensional accuracy better than hot-rolled plate, and right-rolled thin product thickness is about 0.18mm, so the majority of users favor.
Cold rolled steel coil substrate products deep processing of high value-added products. Such as electro-galvanized, hot dip galvanized, electro-galvanized fingerprint resistant, painted steel roll damping composite steel, PVC laminating steel plates, etc., so that the excellent quality of these products has a beautiful, high resistance to corrosion, has been widely used.
Cold rolled steel coil finishing after annealing, cut the head, tail, trimming, flattening, smooth, heavy volume, or longitudinal clipboard. Cold-rolled products are widely used in automobile manufacturing, household electrical appliances, instruments, switches, buildings, office furniture and other industries. Steel plate strapping package weight of 3 to 5 tons. Flat sub-volume typically 3 to 10 tons / volume. Coil diameter 6m.
Bare packing/bundle packing/crate packing/wooden protection at the both sides of tubes and suitably protected for seaworthy delivery or as requested.
