Post on 16-Mar-2020
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Competence centre for pipes. Steel pipes, precision steel pipes and structural hollow sections for steel construction.
Precision pipes in the highest qualityInterfer Rohrunion and Interfer Präzisrohr are the ultimate specialists for steel and precision steel pipes within the Knauf Interfer Group. Together, we have access to an extensive portfolio, a well-stocked inventory and efficient logistics. We guarantee our customers the finest tolerances and the highest quality, in collaboration with the most important institutions and facilities.
For many years, we have worked with various testing associations, such as LR, DNV•GL, ABS, BV and TÜV. We can also provide all of the common testing methods directly on-site in our own testing laboratory.
We offer you our support, from the moment you place your order through to final inspection, and – in cooperation with the testing associations named above – can ensure certification of your products within just a few days. We complete certifications on the basis of the delivery
specifications. On request, we also offer additional services in cooperation with other testing institutes.
Our locations are certified according to OHSAS 18001, ISO 9001 and EN 1090.
Visit our website to see an overview of our current certifications at www.knauf-interfer.de
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• Ultrasonic wall thickness measurement• Positive material identification• Material analysis• Product analysis• Metallographic microsections• Wall thickness measurements by means of outer/
inner diameter tests• Grid measurement• Hardness tests and hardening progression curves
incl. completion of macrosections
Other testing methods and services:
Testing method according to standard
Tensile test DIN EN ISO 6892-1
Notched-bar impact test DIN EN ISO 148-1
Bending test DIN EN ISO 8491
Flattening test on tubes DIN EN ISO 8492
Expansion test on tubes DIN EN ISO 8493
Flanging test on tubes DIN EN ISO 8494
Ring expanding test on tubes
DIN EN ISO 8495
Brinell hardness test DIN EN ISO 6506-1
Vickers hardness test DIN EN ISO 6507-1
Rockwell hardness test DIN EN ISO 6508-1
Weld bead bend test SEP 1390
Ultrasonic testsSEP 1915/18/19
EN 10246-6/7/14 DIN EN ISO 10893-8/10
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A comprehensive portfolio with high availability
The competence centre for pipes offers a broad variety of steel and precision steel pipes – which are always available in a range of grades and sizes – stored in over 80,000 m2 of warehouse space at our central distribution centres in Voerde and Düsseldorf.
Thanks to our extensive processing capabilities, we can also provide short-term, customised products for any conceivable requirement. From our production facilities or via our sales offices in Bremen and Schwaig near Nuremberg, as well as our international subsidiaries, we supply
customers throughout Europe with pipes precisely designed to meet their requirements – reliably and on time. This is made possible through our modern and efficient warehouse logistics systems, as well as our extensive steel processing system.
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Our pipes are used in a wide range of applications:
• Tubes for pipelines (gas, water, oil and solids)
• Steel construction• Plant and machinery for agriculture• Hydraulic steelwork• Crane construction• Smokestack construction• Light and traffic masts• Driven piles and foundation piles• Machine construction• Power plants and boiler construction• Construction and plant engineering• Process engineering• Chemical and petrochemical industry• Roller industry• Automotive industry• Hydraulics and pneumatics• Construction machinery industry
The Signal Iduna Park in Dortmund is just one example of the architectural possibilities created by the use of our pipes. Protected by special coatings, they are capable of withstanding the elements.
In the offshore sector, our products are exposed to extreme loads. Only the highest quality materi-als can be used in this environment.
At home in many industries
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The expertise of our highly qualified staff, our modern machinery and our range of processing options let us offer our customers tailored solutions and prompt delivery. Seamless steel pipes, boiler tubing and hollow sections for steel construction are only a small part of our product range. We supply pipes in a range of materials and dimensions. Depending on your application scenario, we have the right coating or lining – directly from our stock.
Steel pipes
Our product portfolio
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Our range of precision steel pipes comes in all common sizes, materials and delivery conditions and is complemented by a wide range of processing options – from seamless precision steel pipes to hydraulic lines, welded cold drawn precision steel pipes to conveyor pipes. Our broad portfolio of precision steel pipes strives to meet our customers’ needs, and underscores our claim to be a competence centre which can achieve your requirements.
Precision steel pipes
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Our product portfolioin detail
Structural hollow sections for steel construction
Standards/qualities Dimensions Wall thicknesses
Hot-finished EN 10210-1/2also with fin cut inner seam
40 x 40 mm to 400 x 400 mm as well as 50 x 30 mm to 500 x 300 mm
4.0–20.0 mm
Precision steel pipes
Standards/qualities Material Delivery conditionsOutside
diameterWall thick-
nesses
Seamless precision steel pipes
Seamless precision steel pipesEN 10305-1 (DIN 2391)
E235 (St 35) E355 (St 52)
+C (BK)+N (NBK)+LC (BKW)+SR (BKS)+A (GBK)
3–220 mm 0.5–15.0 mm
Seamless precision steel pipes forhydraulic and pneumatic pressure
linesEN 10305-4
(DIN 2391/C-DIN 1630)
E235 (St 37.4) E355 (St 52.4)
+N (NBK)phosphated/
non-phosphated4–100 mm 0.5–10.0 mm
externally galvanised or electrolytic
galvanised4–42 mm 1.0–6.0 mm
Welded precision steel pipes
Welded/cold drawn EN 10305-2 (DIN 2393)
E195 (St 34-2)E235 (St 37-2)E355 (St 52-3)
+C (BK), +N (NBK)+LC (BKW)+SR (BKS) +A (GBK)
6–200 mm 0.5–7.5 mm
Welded/cold sized EN 10305-3 (DIN 2394)
E195 (St 34-2)E235 (St 37-2)E355 (St 52-3)
+CR1 (BKM)+N (NBK)+A (GBK)also with
fin cut inner seam
8–159 mm 1.0–5.0 mm
Conveyor pipeswith fin cut inner seam and
reduced tolerancesalso externally
galvanised50–159 mm 1.5–5.0 mm
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Steel pipes
Standards/qualities Outer diameter Wall thicknesses
Seamless steel pipes
EN 10210-1/2
13.5–660.0 mm 1.8–100.0 mmEN 10297-1
EN 10216-3, AD 2000 W4/DGRL 97/23/EG
API 5L
Seamless boiler pipes
EN 10220, EN 10216-2, AD 2000 W4/DGRL 97/23/EG, VdTÜV WB 511/2
13.5–610.0 mm 1.8–30.0 mmDIN 2448/17175, AD 2000 W4/TRD 100/102
Produced according to DGRL 97/23/EG certification
SAW longitudinally welded steel pipes
EN 10217-1
406.4–1.420.0 mm 10.0–50.8 mm
EN 10217-5
EN 10219-1/2
EN 10208-2 / ISO 3183
API 5 L
SAW spirally welded steel pipes
EN 10217-1
406.4–1.420.0 mm 5.0–16.0 mm
EN 10217-5
EN 10219-1/2
EN 10208-1 / ISO 3183
API 5 L
High-frequency longitudinally seam welded steel pipes
EN 10217-1
21.3–610.0 mm 2.0–25.0 mm
EN 10217-2
EN 10217-3
EN 10219-1/2
EN 10210-1/2
EN 10208-1 / ISO 3183
EN 10208-2 / ISO 3183
API 5 L
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Processing our products
We can make a particularly extensive range of qualities and dimensions available within a very short amount of time. We also offer a range of processing options tailored to your production processes.
Our modern machinery is tailored to your individual and demanding requirements and offers a high level of added value for your production chain.
We saw, mill, fire and chamfer your pipes so that they are not only precise, but also immediately ready to be used.
Any processing steps which are not carried our by us are executed in close cooperation with selected and qualified partners.
Our surface finishes complement our range of products.
• Galvanising• Chrome plating• Powder coating• Painting
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Precision milling Mitre saw
Cuts a wide range of dimensions – accu-rate to a hundredth of a millimetre.
For cold and hot-finished and high tensile strength hollow sections for steel construction, available in a range of dimensions and wall thicknesses.
Processing range
Pipe profile cutting machine
Dimension rangePipe diameter
48.3–1.420.0 mm
SawingAll dimensions from our product line
Brush deburring, washing and protective coating
BevellingAll available inner and outer
bevellings
End machining
Defined chamfering on the inside and/or outsidePlaned ends
Brushed chip-free on the inside Diameter range: 8–150 mmFixed lengths: 30–3,000 mmWith extremely tight length
tolerances
Milling
Freely programmable hole patterns, contours etc.
Diameter range: 16–70 mmWall thicknesses: 0.8–2.0 mmFixed lengths: 160–1,000 mm
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Interfer Präzisrohr GmbH
Schiessstr. 3940549 DüsseldorfGermanyPhone +49 211 52294-0Fax +49 211 52294-130interfer-praezisrohr@knauf-interfer.de
Interfer Rohrunion GmbH
Am Industriepark 246562 VoerdeGermanyPhone +49 281 94230-0Fax +49 281 94230-187rohrunion@knauf-interfer.de
Interfer Rohrunion GmbHSouthern Sales OfficeWieseneckstrasse 2690571 SchwaigGermanyPhone +49 281 94230-0Fax +49 281 94230-288rohrunion@knauf-interfer.de
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