Pipeline Assessment and Integrity Management

HEBNA provides for the reliable inspection and assessment of HDPE or cement lined steel pipelines.

While HEBNA is a pipeline service company specializing in internal pipeline corrosion protection, our newly augmented pipeline inspection and assessment services allow us to also provide: pipeline integrity management; pipeline repair; replacement or rehabilitation; as well as pipeline operation and maintenance.


HEBNA iMFL Lined Pipeline Inspection Tool


Features and Performance Specifications

The HEBNA CORPORATION management team has been involved in the pipeline lining industry for decades. HEBNA, a leading pipeline contractor, has successfully lined millions of feet of pipe to prevent both internal corrosion, and abrasion. In the past we often heard from corrosion engineers that they know thermoplastic liner is a long term solution to prevent internal corrosion in pipelines, but they need to be able to determine five years from now if a lined pipeline has developed external corrosion. HEBNA is now is able to offer pipeline contractors and operators the ability to effectively inspect steel pipe that has been lined with cement mortar, HDPE or other internally lined or coated pipelines. HEBNA has teamed with a mature In-Line Inspection (ILI) company with unique qualifications that often exceed general inspection and industry standards. Our services also include a professional engineering firm that has done work around the world. Our past clients have included oil and gas pipeline operating companies and water transportation organizations.

HEBNA New Services

  • Extra High Resolution (XHR) Magnetic Flux Leakage (iMFL) inspection
  • High Resolution Geometry Inspection
  • Inertial Tracking features and Inertial Mapping Capabilities
  • Reversible Inspection Tools

Inspection Sizes

Pipeline Sizes Tethered Pig Pulls Free Swimming Lined or Coated Pipelines
3″ & 4″ & 6″ Yes Yes * NA
8″ to 58″ Yes Yes Yes

* Not available. Further research and development required

HEBNA offers configuration ILI tools that allow for inspection even under the most difficult circumstances. Recent advances that are built into HEBNA services include reversible inspection tools that can be launched and received from the same point. Available in both small and large sizes, reversibility in free swimming or tethered applications allows inspection procedures that have typically not been possible.

Inspection tool sizes range from those serving 3 and 4-inch diameter lines that exist in many gathering systems, up to the largest diameter aqueducts. While iMFL technology requires heavy inspection equipment, our large diameter HEBNA equipment is significantly lighter than the older and competing equipment. In the inspection of operating pipelines, new analysis software and special operating procedures provide thorough information on pipeline damage in a significantly shorter time frame.

Whether you require exceptional service for a customary inspection, or for a specific complication that demands new solutions, HEBNA has state-of-the-art equipment and personnel to meet your needs. Joint projects that develop special solutions are a HEBNA specialty, making us one of the top pipeline inspection companies in the business. Forthright and helpful service is always provided to the highest standard.

An overall view of a typical new configuration HEBNA iMFL ILI tool is shown in Figure 1.

Feature Benefit
HEBNA Extra High Resolution XHR iMFL ILI Tool will measure Through pipelines lined with HDPE, Cement mortar, Polyurethane, or Epoxy. Analyze steel wall integrity & liner thickness. Improved decision making. Manage risk. Allows Liners to be used in PHMSA regulated pipelines.
Extra High Resolution Data Industry Leading measurements. Improved decision making.
Collapsible to 75% pipe OD. Reduces tool getting stuck. One tool for pipelines with multiple wall thicknesses. Possibly multiple diameters.
Patent pending magnetic assembly support for bi-directional tool travel. Fewer excavations. 2 runs per excavation. Cost savings.
Short, light tools 58 inch or 1475 mm long, <= 200 psi required. Easier to handle. Less manpower. Up to 80 hours of operating time. Cost savings.
Space Frame Based Tools for larger diameter pipeline are lighter than conventional tools. Easier to handle. Lower pressure requirements. Cost savings.
Low friction travel and minimal surging Lower pressure and Less power required. More accurate date. Longer runs – up to 300 km
Standard Combination iMFL, one-inch geometry and intrinsic 6 axis inertial navigation system. Fewer runs required. Cost savings.
Operational full inertial mapping unit to sub- meter accuracy. Accurate mapping of bend locations, including degree and radius of bends.
Reversible with fluid flow or with tethered propulsion unpiggable pipelines. Cost savings Fewer excavations, multiple options including unpiggable pipelines. Cost savings.
Passes 1 1/2D bends forward or reverse.
Fewer excavations. Lower costs.
Pipe diameter from 3 inches to 120 inches One service provider for all your needs. Fewer excavations. Easier to manage. Lower costs.
Standard 80 hour operation Longer runs, Lower costs.
Wi-Fi wireless communication with tool. Faster analysis.
High speed ethernet communication and data transfer. Reduced data loss.
Remote tool startup, monitoring, control and data transfer, literally across continents. Lower mobilization costs. Faster analysis.
Internet based file transfer protocol (FTP) for fast data transfer and accelerated availability for processing. Quick turnaround. Faster analysis.

XHR iMFL: Readings Through Lined Steel

Pipeline operators have been benefiting from Internal thermoplastic liners for the past quarter century. HDPE pipe has many benefits over steel pipelines; however, its biggest drawback is its pressure limitations. When HDPE is combined with steel, pipeline operators get the best of both worlds as both small & large diameter pipe can operate at pressures up to 5000 psi and be protected from internal corrosion and abrasion. Operators find a lower cost of ownership of lined pipelines where internal corrosion or abrasion is potential problem. Pipeline maintenance budgets are slashed as this dual containment system prevents costly repairs due to leaks caused by corrosion. Costly chemical inhibitors can be eliminated saving operators money year after year. Optimum flow is not sacrificed from build-up of scale and wax as is the case in unlined pipe.

With HEBNA’s new iMFL inspection tool for lined pipelines, the quality of readings is not sacrificed by the liner, whether it is in cement mortar, HDPE or epoxy. As per scan A and scan B below, it is difficult if not impossible to see any difference between a XHR iMFL reading with steel lined with .500” wall HDPE or no a reading with no liner present.

Application Liner Type XHR iMFL
Oil & Gas

HDPE, cement, polyurethanes, epoxies

Mining Slurry Lines

HDPE, ceramics, urethanes

Raw Water Aqueduct

Cement, HDPE, epoxies

Water Transmission Cement, HDPE, epoxies Yes

Many pipelines are required by regulators to be measured in a minimum 5-year interval. Operators can now manage risk by choosing a dual containment solution and still retain the ability to measure the integrity of the both the liner and the steel pipeline. With the HEBNA XHR !MFL tool not only will pipelines get the most accurate readings possible, they will get more accurate measurements on lined steel than other pipeline inspection companies are capable of reading on unlined steel.

Figure 2

Extra High Resolution (Xhr) Data Acquisition

HEBNA is a market leader using strong Oersted magnetization levels, that produce measurably better results in analysis as seen in Figure 3.

Defect Comparison: HENBA vs Competitor

HEBNA and a competitor both inspected the same pipeline within a brief timeline. Several locations had defects that were identified in both inspections. One such location is discussed here.

Figure 5 and Figure 6 are raw data sets from the same location in the respective inspections. HEBNA Extra High Resolution (XHR) data in Figure 6 is visibly more definitive compared to the High Resolution (HR) competitor data of Figure 5.

The greater definition is the result of basic inspection tool characteristics. The HEBNA tool has more sensors with better spacing with more frequent sampling than the competing tool, resulting in a significantly higher magnetic field in the pipe wall so that perturbations in the field are more visible.

The competitor only reported three defects, while the HEBNA tool reports 5 defects.

Figure 6 also shows lower level indications like those from A to B to C to D that are caused by the pattern of seamless pipe. This pipe is clearly seamless. The competitor called it as ERW.

The competitor reported location of the defects on the exterior of the pipe. HEBNA reported the defects on the pipe interior. There is substantial secondary data to support the actual location as being on the pipe interior.

Comparative defect sizing results are shown below in Table 1.

The significantly greater width reported by HEBNA reflects the greater clarity of data as shown in Figure 6. While HEBNA data shows greater width, it also recognizes greater contribution to signal strength from defect width and therefore identifies defects generally to be less deep than the competitor does. It is also worth noting that what appears to be the most significant defect was not detected by the competitor. That may be due to the fact that greater defect length suppresses the iMFL signal and makes such defects harder to see. XHR data helps in such situations.

Pipeline Operators Forum (POF):

Advised Specifications For Intelligent Pig Inspection

The Pipeline Operators Forum Specifications and Requirements for Intelligent Pig Inspection of Pipelines specify the advised operational and reporting requirements for tools for the inspection of pipelines. Much of the POF recommended material is now included in API STD 1163 which is followed by HEBNA. In addition, definitions of the various categories of pipeline defects are given by POF. HEBNA Specifications meet the Performance Standards of POF.

The various categories of defects are presented in Table 2 below. The Probability of Detection (POD) of an anomaly is normally 90% for the size references shown. The typical detectible depth of a high resolution HEBNA tool for general corrosion is 10% of the wall depth or 0.10t. The typical detectible depth for pitting is 15% or 0.15t. Both should have a POD of 90%. Depth, length and width sizing accuracy for high resolution iMFL tools are depth ±10-15% and length and width accuracy of ±10-20mm. The typical certainty level for sizing anomaly depth, length and width is 80%. Location accuracy of an anomaly for an iMFL tool is advised to be 0.25% of the distance for/to the reference marker. The location accuracy of an anomaly from the closest weld is advised to be 0.15m. The circumferential location accuracy of the anomaly is advised to be within ±10 ̊ of the anomaly.

Shown graphically in Figure 7, these metal loss anomaly classes are defined to specify metal loss measurement capability of an inspection tool. They are presented as a plot of length along the axis of the pipe versus width around the circumference of the pipe. The parameter A simply makes the plot non-dimensional so that it applies to pipe of all wall thickness. If wall thickness (t) is less than 10mm, A is 10 mm. If it is greater than 10 mm, A is equal to t. The classes provide a common basis for comparison of the capabilities of various inspection tools. HEBNA meets the capability of other inspection tools in virtually all classes and establishes its own standard in several, notably those for which data acquisition and analysis is applicable. That includes the characterization of defect growth between inspections for which POF specifies the ability to detect defects of 5% of the wall thickness and to measure depth with a resolution of 5% t.

Figure 7: Graphical Depiction of Metal Loss Anomaly Classification

A summary of the specified performance of several !MFL ILI tools including HEBNA is given in Table 3. The table shows a comparison of the specified capabilities of HEBNA tools compared to those of other ILI vendors who publish their own specifications. When referring to the published specifications, HEBNA encourages the reader to consider the foregoing discussion and to recall the actual performance of HEBNA tools when comparing them to the other tools shown in Table 3.

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June 2015, Survey Monkey Respondent
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June 2015, Survey Monkey Respondent
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