Reformer tube inspection in chemical plants

FOERSTER offers non-destructive materials testing services in the chemical industry throughout the world. Reformer tube testing is a main focus of our activities.

Tests on reformer tubes are done at ammonia plants, methanol plants, refineries, and steel plants.

Highly trained ndt employees in possession of the qualification according to DIN EN 9712 including several level 2 and level 3 test engineers are available for mechanised reformer tube tests.

In combination with our in-house development and manufacture of eddy current sensors, we can reliably perform even those eddy current tests that are very difficult in terms of technological sophistication.

External tube inspection

  • LEO-SCAN

This proprietary eddy current and diameter measurement device has been in use for more than 20 years. The eddy current probes were developed by FOERSTER specifically to test reformer tubes with FULL penetration up to 23mm and all alloys. Unlike standard eddy current systems, these powerful probes generate a magnetic field strong enough to completely penetrate the tube material. The most important requirement for testing these tubes is the need to look inside the tube wall for the formation of micro-fissures and cracks. As the EC probes do not require a couplant and operate electronically, the readings obtained are completely repeatable from test to test. The diameter measurement is accomplished simultaneously using up to four lasers depending on tube to tube clearances. The lasers allow for maximum accuracy and repeatability. Diameter measurement of tubes is used as a secondary procedure revealing normal creep and also clarifying the probable conditions that caused damage. Cracks can form without diametric growth. There can also be significant diametric growth without cracking. These conditions are generally caused by operational upsets.

The complete system is mounted on a unique tube crawler designed and built by MP. The special design of the crawler allows for passage from the furnace roof to the floor, passing below any flue gas collection tunnels. The probes and lasers are mounted near the bottom of the crawler allowing readings to be taken in the most critical lower areas of down flow steam methane reformers. The device is also designed to test reformers with small tube to tube clearances down to 20mm. This allows the inspection of furnace designs with very tight clearances from the OD. Other configurations are available to test up flow reformers. Tubes are inspected in less than two minutes each. No cleaning of the tubes is required.

  • MIDREX

The MIDREX Direct Reduction Process converts iron ore into a high-purity product for use in steel making, iron making and foundry applications. The process flow is upward. The tubes have diameters between eight and twelve inches. For crack inspection, the reliable FOERSTER developed eddy current technique is used. Cleaning of the tubes due to greater amount of scale on the tube surfaces is not required. Integrated multi laser devices accurately measure tube creep, which can be 10% or more of the tube diameter. The mechanical and electrical components of the mechanized inspection system are especially designed for the inspection of the MIDREX tubes which considers process flow direction, scaling, dual alloys and large diameters. One tube can be accurately inspected in less than two minutes.

Internal tube inspection

A new sophisticated inspection device has been developed by MP and is available for use. It has proven to be rugged and reliable in actual critical field service. A powerful laser unit allows measurement of the tube ID with a high level of accuracy.

This tool was developed for those furnaces that may require creep values registered below the floor, have tubes that are touching and can not be fully inspected from the OD, or simply to use the access to the inside for testing when it is available as a secondary confirmation of tube creep condition.

The results show the tube diameter through 360° and in a 3-dimensional view. This information can be shown for single tubes, single rows or for the entire reformer.

ID laser testing takes less than two minutes per tube.

Pigtail Measurement

Outlet pigtails are critical areas which need closer inspection due to their location and designed function. For the detection and the evaluation of tube expansions FOERSTER has developed a unique device to measure pigtails diametrically from the
tube outlet to the manifold. These measurements are performed on two axes. This configuration enables the evaluation of the diametrical growth of both the straight pigtail sections and the bends with their diametrical differences due to the bending process.

As compared to manual gauge testing this new system is very fast, reliable, repeatable and provides an accurate diameter profile over the complete length of the pigtail.

Remaining lifetime

Magnetische Prüfanlagen and U. S. Thermal Technology are proud to introduce TUBELIFE, the new state-of-the-art probabilistic tube life assessment software. This program, combined with our advanced inspection-capability, provides integrated reformer asset management to the refining and petrochemical industries.

This software utilizes customized stress analysis, proprietary creep models, and heat flux and skin temperature profiles for different reformer designs and burner configurations to calculate the cumulative probability of catalyst tube failure over time.

Inspection results are taken into account in the output of the program. Future operational conditions can be added and modeled to observe the possible effects. This tool enables the industry to achieve a lower risk of failures and unplanned plant outages and also allows for an optimized spares strategy.

Topends Ultrasonic inspection

Several furnace designs utilize a dissimilar weld to connect the inlet assembly to the reformer tube. In some cases this has led to cracking in the heat affected zone of the weld on the lower alloy side. FOERSTER has developed a customized testing device and procedure for testing these welds in some furnaces. Procedures can be adapted for many furnace designs. This is an ultrasonic test incorporating special devices to assurecomplete coupling and accurate probe manipulation from the ID. Cracks are detected and sized allowing the continued safe operation of the furnace.

This website uses cookies

We use cookies to personalize content and advertisements, to be able to offer functions for social media and to analyze access to our website. We also share information about your use of our website with our social media, advertising and analytics partners. Our partners may combine this information with other data that you have provided to them or that they have collected as part of your use of the services.

Our cookies have changed, so you will need to give your consent again.

Your previous consent to our cookies has expired, so you will need to consent again.

Necessary cookies help to make the website usable for the user. They store basic information, such as a login to the website or the consent to the individual cookies.

Name Provider Purpose Duration Type
__hs_opt_out HubSpot notwendig

This cookie is used by HubSpot to ensure that a user after an opt-out does not have to ask for consent again.

13 months Cookie
__hs_do_not_track HubSpot notwendig

This cookie is used by HubSpot to disable the tracking of a user.

13 months Cookie
__hs_initial_opt_in HubSpot notwendig

This cookie is used by HubSpot to store the consent to tracking.

7 days Cookie
hs_ab_test HubSpot notwendig

This cookie is used by HubSpot to always assign a user to the same group during A/B tests.

Session Cookie
*_key HubSpot notwendig

This cookie is used by HubSpot to prevent a user from having to log in multiple times for the same content.

14 days Cookie
hs-messages-is-open HubSpot notwendig

This cookie is used by HubSpot to save chat widget settings.

30 minutes Cookie
hs-messages-hide-welcome-message HubSpot notwendig

This cookie is used by HubSpot to ensure that the welcome message of the chat is displayed once a day.

1 day Cookie
__hsmem HubSpot notwendig

This cookie is used by HubSpot to store the login process of a user.

1 year Cookie
hs-membership-csrf HubSpot notwendig

This cookie is used by HubSpot to prevent a login process from being corrupted.

Session Cookie
hs_langswitcher_choice HubSpot notwendig

This cookie is used by HubSpot to store the language selected by the user.

2 years Cookie
__cfduid HubSpot notwendig

This cookie is used by HubSpot to securely transfer data via CDN / Cloudfare.

Session / 30 days Cookie
__cfruid HubSpot notwendig

This cookie is used by HubSpot to securely transfer data via CDN / Cloudfare.

Session Cookie
gits_cookie_accepted_* digiwerk GmbH

Saves the cookie banner selection.

unlimited LocalStorage
DataTables_* TYPO3

Is stored by the CMS system TYPO3 vebSaves user settings for displaying data in the backend.

unlimited LocalStorage
t3-tabs-* TYPO3

Saves user settings for displaying data in the backend.

unlimited LocalStorage
be_typo_user TYPO3

Required by the CMS system TYPO3 to allow users to log on to the backend.

1 year LocalStorage
PHPSESSID TYPO3

Required by the CMS system TYPO3 to allow users to log on to the backend.

1 year Cookie

Marketing cookies help to recognize visitors to websites. This enables, among other things, to show them more accurate advertisements and search results.

Name Provider Purpose Duration Type
__hstc HubSpot

This cookie is used by HubSpot to register a unique ID that can be assigned to statistical data of the user.

13 months Cookie
hubspotutk HubSpot

This cookie is used by HubSpot to register a unique ID that can be assigned to statistical data of the user.

13 months Cookie
__hssc HubSpot

This cookie is used by HubSpot to detect the session of a user.

30 minutes Cookie
__hssrc HubSpot

This cookie is used by HubSpot to detect the session of a user.

Session Cookie

Statistical cookies help to understand how visitors interact with the site by collecting and reporting information anonymously.

Name Provider Purpose Duration Type
_pk_id.*.* Matomo

This cookie is used by Matomo to store some details about the user, such as the unique visitor ID.

13 months Cookie
_pk_ses.*.* Matomo

This cookie is used by Matomo, for short-lived cookies, which are used for temporary storage of data for the visit.

30 minutes Cookie
_pk_testcookie..undefined Matomo

This cookie is used by Matomo to check whether the visitor’s browser supports cookies

Session Cookie

Cookies are small text files that are used by websites to make the user experience more efficient.According to the law, we can store cookies on your device if they are absolutely necessary for the operation of this site. We need your permission for all other types of cookies.This site uses different types of cookies. Some cookies are placed by third parties that appear on our pages.