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The coding system according to [EN13508-2:2011]describes tightness specifications as independent main codes. The following features must therefore always be recorded additionally with the corresponding main code:
These codes only need to be recorded additionally if they are also "visible". (Image: Infiltration … |
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The required characterisations (Char. 1 and Char. 2) serve to describe the observation in more detail. The first usually specifies the type of observation and the second specifies the first. Characterisations are therefore to be used in the order given. Code (Y) must be entered for each characterisation that is required but not identified. The use of code (Y) is restricted to justified exceptional cases only. The reason for the use of (Y) shall be stated … |
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(Image: Quantification of circumferential crack) |
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If increased accuracy is required, the use of measurement methods is recommended. This is determined by the client. The accuracy must be selected taking into account the performance of the measurement method so that a subsequent evaluation and intended use of the coded information is possible. For direct optical inspection, the quantifications must always be determined by measuring methods. As a rule, the application of a scale with mm graduation or … |
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The position of the observation on the circumference must always be recorded ► for this purpose a clock face reference is used. (Image: Observing defects using the clock face reference) (Table: Clockface reference records) |
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(Image: Examples … |
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The reference to a pipe joint or a manhole connection must always be documented with (A). In the picture, the reference between root ingrowth and pipe joint is marked by (A) in the column "joint". (Image: Root ingrowth in a pipe joint ) |
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Photo Reference
Video Reference
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If an observation cannot be fully described with codes ► add further information as remarks. They should be short and concise. ATTENTION: Remarks are not machine-readable, as evaluation algorithms cannot process them - the information gets lost during the process. Important: The description of an observation with (possibly several) codes is always favourable. |
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Control codes describe the sequence of the inspection in an object. Control codes as independent codes are not explicitly included in EN 13508-2. Nevertheless, additions demanded by the client are permitted at various points and should then be applied accordingly. The following table contains the necessary control codes and the reference to the corresponding main code according to EN 13508-2. [EN13508-2:2011] (Table: Control codes ) |
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(Image: Example: Control codes - cancellation of an inspection) |
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The following examples serve as an aid for using the control codes to document the sequence of the inspection in a sewer section or pipeline. All required control codes are shown in bold/black. Defect codes shown in green are exemplary observations without quantification. Example 2: Continuous visual inspection. Data set: BCDXP.....BBAA.....BCEXP (Image: Control code - visual inspection image 1) |
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Example 4: Cancelling the optical inspection and continuing the inspection from the opposite direction, the opposite side (of the obstacle) is not reached. 1. Data set: BCDXP - BBAA - BDCYY (Image: Control code - visual inspection image 3) |
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Example 5: Cancelling the visual inspection. Continuation of the inspection from the opposite direction is not possible. 1. Data set: BCDXP - BBAA - BDCYY - BDCYZ In contrast to the previous examples, only one data set is supposed to be created. The reason for not being able to continue the inspection from the opposite direction shall be described as a remark on the code BDC YZ. (Image: Control code - visual inspection image 4) |
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Drain and sewer systems are permanently or temporarily subject to different physical, chemical, biochemical, and biological stresses. (Image: Street collapse caused by leakiness) [ATVM143-1:2004] Depending on various factors, these stresses can more or less quickly lead to different structural, operational, environmental, or hydraulic deficiencies. These factors include:
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Coding completed
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Apr 28, 2022 News Madeleyn Cajamarca This is precisely the principle behind the idea of bioengineered living, “functional” materials. This clever study used the kombucha technique to grow a starchy material (similar to ingredients of biodegradable plastic) that can detect light, remove hormones from wastewater, and more.
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Apr 04, 2022 News IMPREG GmbH To get something done, you have to tread new paths. This has always applied to IMPREG since the company’s birth in 1999.
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May 03, 2022 News Isle Utilities Xylem and Isle Utilities Partner to Help Water Utilities Pilot and Scale Innovative Water TechnologyGlobal water technology leader, Xylem (NYSE:XYL), today announced it is sponsoring an innovative new funding mechanism for water utilities to deploy promising new technologies.
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An assessment of the stress and deformation state of buried pipes requires consideration of the entire mechanical system "road-soil-pipe" → model consideration. Pipe statics are generally calculated in a plane model. Plane models are only valid if all conditions (geometry, material and load) are constant along the longitudinal direction of the pipeline. In reality, of course, there are deviations. However, these must remain so small that they have … |
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An assessment of the stress and deformation state of buried pipes requires consideration of the entire mechanical system "road-soil-pipe" → model consideration. Pipe statics are generally calculated in a plane model. Plane models are only valid if all conditions (geometry, material and load) are constant along the longitudinal direction of the pipeline. In reality, of course, there are deviations. However, these must remain so small that they have … |
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The main factors influencing the static model or the load-bearing behavior of the pipeline are:
The quality of the pipe embedment zone is significantly influenced by the installation conditions, which in turn must be included in the structural analysis. … |
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The main factors influencing the static model or the load-bearing behavior of the pipeline are:
The quality of the pipe embedment zone is significantly influenced by the installation conditions, which in turn must be included in the structural analysis. … |
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The soil body (initial + main backfill) located above the pipe generates vertical loads (static earth load). Under certain conditions, these loads can be reduced. If these conditions apply, we speak of the "silo effect". When applying the silo theory, the following are of influence:
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