|
[China]
Trade Verify
Address: China Factory : Suzhou Industrial Park, JiangSu Province,China
Contact name:amy
BEST PIPELINE EQUIPMENT CO.,LTD |
|
Verified Suppliers
|
|
|
Production Information :
Steel designation according to EN:
• steel for tubes for mechanical treatment:
steel E355 + AR, E 355 + N
E – steel for machine parts, 355 – minimum yield strength in N/mm2,
+AR – heat treatment is not required,
+N – normalising annealed or formed
steel 20MnV6
steel designated by chemical composition – guaranteed mean C
content 0,20%, guaranteed content Mn and V
+AR – heat teratment is not required, +N – normalising annealed or
formed
• steel for machine parts:
steel without heat treatment after mechanical treatment
non-alloy steel E 235, E275, E315, E355
Condition +AR or +N
steel with specific impact qualities (fine-grain) E275K2, E355K2
K2 – guaranteed characteristic of impact energy 40 J (K) by
temperature –20 °C
steel with heat treatment after mechanical treatment
steel C22E
C – steel with carbon content 0,22%, E – reference to maximum
checked content of S and P
steel 38Mn6
– guaranteed mean C content and guaranteed Mn content
Steel pipe construction, pipelines and ship building in the North and Baltic Seas present the highest demands on material and weld seams. For these extreme demands of the wind, energy, oil and ship building industries, we stock HF and UP longitudinal welded as well as seamless steel pipe from reputed manufacturers.
Pipe can be delivered from stock according to the following standards and materials:
Welded cold drawn precision steel tubes
Standard EN 10305-2
Dimensions 8 x 1 mm to 200 x 10 mm
Lengths 4 to 7 m
other lengths and fixed lengths on request
Delivery conditions +C (BK)
+N (NBK)
+A (GBK)
+LC (BKW)
+SR (BKS)
Materials Steel grade (EN)
E235
E355
other materials on request
Certification 2.2 acc. to EN 10204
other certifications on request
Welded cold sized precision steel tubes
Standard EN 10305-3
Dimensions 8 x 1 mm to 159 x 4.5 mm
Lengths 6 m
other lengths and fixed lengths on request
Delivery conditions +CR1 (BKM)
+CR2 (BKM/soft)
+N (NBK)
other delivery conditions on request
Materials Steel grade (EN)
E190
E195
E220
E235
other materials on request
Surface treatment cold rolled strip, pickled or unpickled hot rolled strip, aluminized,
sendzimir galvanized, galvanized, hot-dip galvanized,
for chrome-plating, inside welding seam removed
Certification 2.2 acc. to EN 10204
other certifications on request
We stock and supply longitudinal and spirally welded steel pipes for many different areas of application and segments in standard or commercially available lengths according to your requirements.
■ Pipes for pressure applications
Welded pipes
■ Pipes for steel construction
Welded pipes according to EN 10219-1 and 2 in materials S 235 JRH,
S 275 JOH, S 355 JOH
and S 355 J2H
■ Pipes for water transport
Welded pipes according to EN 10224 (DIN 2460)
■ Pipes for flammable media
Welded pipes according to EN 10208 (DIN 2470)
EGYEDI MÉRETŰ CSŐGYÁRTÁS
Lehetőség van speciális, nem szabvány szerinti méretű csövek
gyártására, ennek minimum mennyisége mindig a
gyártandó mérettől függ.
Gyártási lehetőségek préseléses technikával (hosszhegesztett cső):
Ø 406,4- 2000 mm átmérőig, hossz: 2000-15100
mm, falvastagság: 8-101 mm
Gyártási lehetőségek hengereléses technológiával (hosszhegesztett
cső) Ø 1000-4500 mm, hossz: 1000-3500 mm, falvastagság:
10-130 mm
Egyedi (mag) lyukasztásos technológiával készített honolt és
honolásra alkalmas hidraulikus, varratnélküli és hegesztett
csövek 1600 mm átmérőig, 22 méteres hosszig különösen alkalmas
energia, olaj és gáz, gépipari, vízgépészeti,
anyagmozgatási célokra.
The advantage of steel tubes for precision applications is the high precision of their manufacturing, the good quality of their surface, and the guaranteed mechanical and technological properties. That is why the pipes are widely used in the machining industry and in the automotive industry. Welded pipes for precision applications are manufactured in the process of cold drawing.
BK (+C) Cold finished/hard (cold finished as drawn).
No heat treatment after last cold forming process.
BKW (+LC) Cold finished/soft (lightly cold worked).
After last heat treatment there is a light finishing
pass (cold drawing).
BKS (+SR) Cold finished/stress relieve annealed.
After the final cold forming process the tubes are
stress relieve annealed.
GBK (+A) Annealed. After the final cold forming process
the tubes are annealed in a controlled atmosphere.
NBK (+N) Normalized. After the final cold forming process
the tubes are annealed above the upper
transformation point in a controlled atmosphere.
PN-EN10305-2 Delivery condition
| Designation | Symbol | Description |
| Cold drawn / hard | +C | Without thermal processing, after the process of cold drawing is finished |
| Cold drawn / soft | +LC | After final thermal processing, appropriate drawing |
| Cold drawn and annealed | +SR | After the final cold drawing process and annealing thermal processing in a controlled atmosphere |
| Annealed | +A | After the final cold drawing process, the pipes are annealed in a controlled atmosphere |
| Normalized | +N | After the final cold drawing process, the pipes are normalized in a controlled atmosphere |
Mechanical properties in room temperature
| Steel grade | Maximum values depending on the delivery condition | |||||||||||
| +C | +LC | +SR | +A | +N | ||||||||
| Steel symbol | RmMPa | A % | RmMPa | A % | RmMPa | ReHMpa | A % | RmMPa | A % | Rm MPa | ReHMpa | A % |
| E155 | 400 | 6 | 350 | 10 | 350 | 245 | 18 | 260 | 28 | 270 do 410 | 155 | 28 |
| E195 | 420 | 6 | 370 | 10 | 370 | 260 | 18 | 290 | 28 | 300 do 440 | 195 | 28 |
| E235 | 490 | 6 | 440 | 10 | 440 | 325 | 14 | 315 | 25 | 340 do 480 | 235 | 25 |
| E275 | 560 | 5 | 510 | 8 | 510 | 375 | 12 | 390 | 21 | 510 do 550 | 275 | 21 |
| E355 | 640 | 4 | 590 | 6 | 590 | 435 | 10 | 450 | 22 | 490 do 630 | 355 | 22 |
Chemical composition (ladle analysis)
| Steel grade | % of the mass | ||||
| Steel symbol | C max | Si max | Mn max | P max | S max |
| E155 | 0,11 | 0,35 | 0,70 | 0,025 | 0,025 |
| E195 | 0,15 | 0,35 | 0,70 | 0,025 | 0,025 |
| E235 | 0,17 | 0,35 | 1,20 | 0,025 | 0,025 |
| E275 | 0,21 | 0,35 | 1,40 | 0,025 | 0,025 |
| E355 | 0,22 | 0,35 | 1,60 | 0,025 | 0,025 |
Inspection and test list
| Inspection or test type | Test frequency | ||
| Internal tests | Acceptance test | ||
| Mandatory | Chemical analysis | M | M |
| Tensile testing | M | One per tested batch | |
| Dimension verification | M | M | |
| Visual inspection | M | M | |
| Optional | Flattening test or expansion test (option 18) | M | One per tested batch |
| Roughness testing | Not applicable | One per tested batch | |
| NDT of the weld in order to identify any longitudinal discontinuities | Not applicable | Individual | |
| NDT in order to detect any leaks | |||
PN-EN 10305-2 Cold drawn steel tubes for precision applications Pictures
