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ROLLING TUBES
Manufacturing of seamed steel tubes.
| Diameter [mm] | Thickness [mm] |
| od ø 350 to ø 5000 and above | from 3 to 25 |
Dimensions
Pipes are supplied with dimensions according to customer specification.
Tolerances on dimensions and shape
Outer diameter:
| Outer diameter in mm | Maximum deviation in mm |
| ø 350 to 1016 | +- ø x 0,5% + 1 |
| ø 1220 - 2220 | +- 6 |
| ø 2230 and more | as agreed with the client |
Lengths of pipe:
Tubes with outer diameter 350-1220 mm - max length of 12 m
Tubes with an outside diameter above 1220 mm - negotiated
(In order to achieve the required length of pipe, the individual elements are welded to each other circumferential welds segments. The maximum length of one element is 3 m).
Straightness:
Pipes are visually equal. Straightness deviation is 2 mm to 1 m in length. The total deviation is the sum of the allowable deviation for 1m pipe, the value may not exceed:
- for up to 6 m 10 mm
- length of 6-9 m for 15 mm
- for 9-12 m length 20 mm
Type of weld
Pipes are welded semi-MIG-131, MAG-135, 125 - automatic submerged arc welding core wire.
The edges of the tube
- Simple
- bevelled
Surface
Pipes are supplied:
- without a protective coating
- after sandblasting
- with insulation
Additional services:
- Grinding of welds
- Installation of additional elements on the pipes in the form of collars, rings, supports, reinforcements, etc.
Pipe research
Performs the following tests:
-visual inspection of the weld surface,
-dimensional control,
-leak test method for penetration,
-NDT ultrasonic welding or radiologically in the reception class B, C, D,
-Other tests can be agreed.
Pipe marking
For extruded tubes are the following: manufacturer, size, character grade, no melting, no production pipe, no welding.
Documentation
3.1 Approval of the plate in accordance with BS EN 10204
Declaration of compliance with the order 2.1 according to DIN EN 10204
Study Reports
| grades | C | Mn | Si | P max | S max | Cr max | Ni max | Mo | V | Cu | temperature | equivalents |
| St3S | 0,22 | 1,10 | 0,10-0,35 | 0,050 | 0,050 | 0,30 | 0,30 | 0,10 | - | 0,35 | - | S235JRG2 | St37-2 |
| 18G2A | 0,22 | 1,00-1,50 | 0,20-0,55 | 0,040 | 0,040 | 0,30 | 0,30 | - | - | 0,30 | - | S355J2G3 | St52-3 |
| St36K | 0,08-0,16 | min 0,40 | 0,15-0,35 | 0,045 | 0,045 | 0,30 | 0,30 | - | - | max 0,30 | 450 | P235GH/HI | 1.0345 |
| St41K | 0,12-0,20 | min 0,45 | - | - | P265GH/HII | 1.0425 |
| St44K | 0,14-0,22 | min 0,55 | - | - | P285NH | - |
| K10 | max 0,17 | min 0,40 | | 0,2 | 0,35 | - | - | max 0,25 | St35.8 | - |
| K18 | 0,16- | min | 0,10- | | | - | - | St45.8 | - |
| 16Mo3 | 0,12-0,20 | 0,40-0,90 | max 0,35 | 0,030 | 0,025 | 0,30 max | 0,30 | 0,25-0,35 | - | max 0,30 | 500 | 16M | 1.5415 |
| 13CrMo9-10 | 0,08-0,18 | 0,40-1,00 | 0,70-1,15 | - | 0,40-0,60 | - | 550 | 15HM | 1.7335 |
| 10CrMo9-10 | 0,08-0,14 | 0,40-0,80 | 0,50 | 2,0-2,5 | - | 0,90-1,10 | - | 580 | 10H2M | 1.7380 |
| 11CrMo9-10 | 0,08-0,15 | - | - | 580 | - | 1.7383 |
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