Steel Division

Linepipe plates

Specializing in extreme conditions

Lowest arctic temperatures, highest pressure in the deep sea, acidic media: Even the most adverse conditions cannot harm our linepipe plates. Our plates can be found at depths of up to 3000 meters below sea level as sourgas-resistant linepipe plates or as land pipelines with a diameter of up to 48" (1220 mm). The highest sourgas requirements are met by our roll-bonded linepipe plates with corrosion-resistant cladding. As specialists in modern thermomechanical rolling processes with accelerated cooling, we are one of the world market leaders in linepipe plates. More than 2 million tons of sourgas-resistant linepipe plates and extremely tough linepipe plates for thick-walled deep-sea pipelines are ample proof of our product success.

Eddy current testing system successfully developed and approved

The oil and gas industry identified local hard zones (LHZ) as the root cause for Sulphide-Stress-Cracking (SSC) failures of carbon steel in severe sour service application representing zone 3 and beyond of the NACE diagram.

The characteristics of the local hard zones are that they reach hardness levels well above the typical base material hardness with a very low thickness (only several 0,1mm). The frequency of occurrence of such local hard zones is very low and random. 

Demonstrating the absence of these local hard zones becomes one of the focal points of the industry. Based on the long lasting in-house experience for eddy current at voestalpine a highly automated testing system was developed and accredited by different oil and gas majors.

The magnetic field of the eddy current of the material represents material properties (magnetic hard vs. magnetic soft). A change of the material property caused by e.g. a local hard zone is detectable and can be identified.

At voestalpine the motorized equipment follows the plate surface by meander with an automated tracking. The coverage of the plate surface is 100% with an overlap from one track to the next. Due to the automated tracking an automated examination report with exact and automated localization of indications is created and recorded.

The Probability of detection (POD) based on different mathematical models and therefore the sensitivity of the system was demonstrated to different oil and gas majors. Additionally the best repeatability of detecting local hard zones were highlighted.

Voestalpine has a track record of more than 2,4 Mio tons of delivered plates for sour service application. For more than 340.000 tons of plates for commercially use for sour service (representing almost 15% of the delivered quantity) this highly automated testing system has been utilized.

 

Steel grades

Compliant with API 5L:

BM(S), X42M(S), X46M(S), X52M(S), X56M(S), X60M(S), X65M(S), X70M(S), X80M(S), X90M, X100M, X120M

Pursuant to EN 10208-2:

L245MB, L360MB, L415MB, L450MB, L485MB, L555MB

Pursuant to DNV GL:

SAWL245(S), SAWL290(S), SAWL320(S), SAWL360(S), SAWL390(S), SAWL415(S), SAWL450(S), SAWL485(S), SAWL555(S)

Pursuant to GOST:

K56, K60, K65

pursuant to ISO 3138:

L245M(S), L290M(S), L320M(S), L360M(S), L390M(S), L415M(S), L450M(S), L458M(S), L555M, L625M, L690M, L830M

 

 

 

Dimensions

Plate thickness:

9.5-63 mm

Plate width

1400–3800 mm (48" pipe diameter max.), depending on steel grade and thickness, smaller widths upon request

Plate length

18,700 mm max.; dependent on thickness and steel grade

Unit weight

20.0 tons max. per unit

Our linepipe plates are thermo-mechanically rolled and accelerated-cooled. All grades are available upon request in sourgas-resistant design at pH3 or pH5 pursuant to NACE TM 0284 Solution A and B. All steel grades are available with notched bar impact testing and Battelle testing (BDWTT) at temperatures below 0 °C. HIC tests for sourgas applications upon request.

 


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Linepipe voestalpine

Linepipe

As world’s leading producers of linepipe plates we are a reliable partner to renowned pipe makers and provide outstanding product quality, best service and highest flexibility.

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Linepipe

Made for toughest requirements

voestalpine Grobblech GmbH is one of the world’s leading producers of linepipe plates. More than two million tons of sour-gas resistant linepipe plates and very tough linepipe plates for thick-walled deep-sea lines testify to the success of our high-quality products. As a partner to renowned pipe makers we provide outstanding product quality, reliable service and flexibility.

Eddy current testing system successfully implemented in commercial projects

We at voestalpine demonstrate the absence of local hard zones (LHZ) by eddy current method and hold the biggest track record of LSAW material in operation. Supported by industry’s supreme accuracy and highly automated testing equipment we provide our partners the basis for a cost efficient project execution in severe sour environments (high H2S).

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Sour service in deep ocean

Extreme pressures in the deep ocean or sour service - Our linepipe plates can stand even the most difficult conditions. Our products are found in depths of up to 3,000 meters meters below the sea surface and also in the form of sour-gas-resistant linepipes. 

Our linepipe plates provide excellent toughness at low temperatures, best weldability and high uniform elongation for strain-based design. Available up to 18.7 m in length and with a weight up to 20 tons per plate.

voestalpine Sour service in der Tiefsee
voestalpine Extreme sour service und Korrosionsbeständigkeit

Extreme sour service and corrosion resistance

Roll-bonded clad plates are used for the manufacturing of clad linepipes. In many cases the mixture of oil, gas and a wide range of chemical elements in riserpipes or linepipes used for the transport of oil and gas formes a highly corrosive environment. Only the highest-quality materials are capable of withstanding this aggressive medium. Our roll-bonded clad linepipe plates with corrosion-resistant cladding meet these highest corrosion requirements. 

Extremely low arctic temperatures and harsh environmental conditions

We are there with land lines up to 48 inches (1,220 mm) in diameter.

We provide excellent toughness at low temperatures and our service is tailored to the individual customer from the time the order is received until the material is loaded for on-time shipment and delivery.

voestalpine arktische Temperaturen

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toughcore®

toughcore®

Heavy plates with a fine microstructure to the very core, created for extremely high toughness and the most adverse environments.

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