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Water well casing in Saudi Arabia should be specified according to the well design, approved project requirements, applicable Saudi regulations and the technical standard referenced for the selected casing system. There is no single casing depth or universal PVC standard suitable for every Saudi well. Material, diameter, wall strength and installation depth must match the actual borehole conditions.
For contractors, consultants and procurement teams, this distinction matters.
A document referring to a SASO standard does not automatically establish the complete engineering specification for a water well casing system. The well itself must also comply with the requirements governing groundwater wells in Saudi Arabia, while the casing has to withstand the mechanical and hydraulic conditions expected during installation and operation.
The correct starting point is therefore the well design, not simply a material name or pipe diameter.
Water well casing is the pipe installed inside a drilled borehole to maintain the opening and form the main structural lining of the well.
Depending on the well design, casing can help:
A complete water well may contain both plain casing and screened sections.
Plain casing is generally used where water or formation material should not enter the well. Screened casing is positioned across selected water-bearing intervals where groundwater needs to enter.
Water well construction in Saudi Arabia is not simply a matter of purchasing casing and starting drilling.
Groundwater wells are subject to licensing and regulatory requirements administered by the Ministry of Environment, Water and Agriculture.
The Ministry regulates activities including:
This regulatory framework should be considered separately from the technical product standards used to specify individual components.
For an actual project, the latest permit conditions, approved design and project specifications should therefore be reviewed before casing is procured.
The Saudi Standards, Metrology and Quality Organization, commonly known as SASO, develops and adopts Saudi standards covering products and technical requirements across multiple sectors.
This includes construction materials, mechanical products and other products that may be relevant to water infrastructure.
For water well projects, however, it is important not to assume that every PVC pipe standard applies to well casing.
A PVC pipe standard written for drainage, water distribution or another application does not automatically become a well-casing standard simply because the pipe material is PVC.
The intended application matters.
A project specification should identify the exact standard required for the casing product rather than using the phrase "SASO approved" as a complete technical specification.
Saudi Arabia has adopted international standards that relate to groundwater and wells, including documents on measuring groundwater levels. Documents like these are useful for terminology and measurement practice.
That document is useful in establishing terminology and groundwater measurement practice, but it should not be treated as a complete design standard for PVC water well casing.
This distinction is important during specification and procurement.
Before purchasing casing for a Saudi project, the engineer, contractor or procurement team should confirm:
SASO provides a standards service through which Saudi standards can be searched by name or number.
The applicable document should be checked directly rather than inferred from another PVC pipe application.
PVC/uPVC and steel are both used in water well construction, but they should not be considered interchangeable.
Their mechanical behaviour, jointing systems, corrosion characteristics and suitability for different depths can vary significantly.
| Factor | PVC/uPVC casing | Steel casing |
|---|---|---|
| Corrosion resistance | High for many groundwater environments | Depends on steel type and protection |
| Weight | Relatively light | Heavier |
| Handling | Generally easier | Requires heavier handling equipment |
| Jointing | Often threaded or manufacturer-specific | Threaded, welded or project-specific |
| Deep-well suitability | Depends on casing class and design loads | Can be selected for demanding structural conditions |
| Installation | Requires controlled handling | Robust but heavier |
| Material selection | Depends on groundwater and structural requirements | Depends on corrosion and structural requirements |
The final decision should be based on engineering requirements rather than material preference alone.
PVC or uPVC can be used in appropriate water well applications when the selected casing system is suitable for the required depth, diameter, loads, groundwater conditions and installation method.
The important phrase is selected casing system.
Not every PVC pipe has the same mechanical properties.
Two pipes with the same outside diameter may have different:
A general PVC water pipe should not automatically be substituted for purpose-designed well casing.
There is no universal maximum depth for PVC well casing.
Depth capability depends on the mechanical properties of the specific casing system and the loads acting on it.
Important factors include:
This means a statement such as "PVC casing can be installed to 300 metres" is incomplete unless it refers to a specific product and defined installation conditions.
Two wells with the same total depth can impose very different loads on their casing.
Consider two 250-metre boreholes.
One may pass through relatively stable formations with favourable installation conditions.
The other may involve unstable material, difficult borehole geometry and significant differential pressure across the casing wall.
Both wells are 250 metres deep, but the structural requirements for the casing may be different.
Depth should therefore be treated as one design input, not as the only criterion for selecting casing.
Collapse is one of the critical considerations when specifying casing for a deep borehole.
The risk occurs when external pressure acting on the casing becomes significantly greater than the pressure inside it.
The casing can then deform inward if its structural capacity is insufficient.
Potential contributors include:
Larger-diameter casing can be particularly sensitive to external loading depending on wall thickness and material properties.
For this reason, collapse resistance should be evaluated from the actual manufacturer's technical data and the design conditions of the well.
A deep casing string also creates axial loading.
As additional pipe sections are installed, the upper connections may need to support the weight of casing below them during installation.
The designer should therefore consider both the pipe body and the connection.
A strong pipe with an inadequately rated joint does not create a reliable casing string.
For threaded PVC/uPVC systems, the thread design and joint capacity should be part of the engineering review.
Casing diameter is selected according to the required well capacity and internal equipment.
The design should consider:
A casing should not be selected solely because a drilling contractor commonly uses that diameter.
The complete pumping system must fit and operate correctly inside the finished well.
The submersible pump is one of the main components that influences final casing diameter.
There must be enough space for installation and removal while maintaining the hydraulic conditions required by the pump manufacturer.
The design should also account for the submersible cable and any other equipment installed alongside the pump.
Insufficient clearance can create problems during installation, operation and maintenance.
Oversizing the casing without engineering justification, however, can increase drilling and material costs.
The appropriate diameter balances hydraulic, mechanical and operational requirements.
A production water well does not normally require water to enter through every metre of casing.
The casing design is usually divided according to the geology encountered during drilling.
Plain casing isolates intervals where groundwater entry is not required and helps maintain borehole stability.
Screened sections allow groundwater to enter the well from selected water-bearing formations.
The screen specification can include:
The screen interval should be based on geological and hydrogeological information from the borehole.
The final casing and screen arrangement should reflect what was actually encountered during water well drilling.
A drilling log can record:
This information helps determine where plain casing is required and where screened sections should be installed.
A casing schedule prepared without reference to borehole conditions can miss the formations that actually need to be isolated or screened.
The borehole must be larger than the casing installed inside it.
The annular space may be required for:
The required difference between borehole diameter and casing diameter depends on the well design.
Drilling a hole only marginally larger than the casing can make correct gravel-pack placement, centralization and sealing difficult.
Where a gravel-packed design is used, selected granular material is placed in the annular space around the screen.
Its purpose is to create an appropriate interface between the natural formation and the screen.
The gravel pack should be selected using information about:
Poorly selected filter material can contribute to sand production or restrict groundwater entry.
Screen slot size should not be selected independently.
It needs to be considered together with the formation and gravel-pack design.
Slots that are too large can allow excessive fine material to enter the well.
Slots that are unnecessarily small can restrict flow and increase entrance velocity depending on the screen configuration.
A technically sound design therefore considers the relationship between:
formation, gravel pack, screen slot and open area.
If a completed borewell produces sand, the cause is not necessarily the casing material itself.
Possible causes include:
Changing from PVC to steel, for example, will not solve a filtration problem if the screen and gravel pack are incorrectly designed.
The source of sand should be diagnosed before changing the casing specification.
Saudi groundwater well projects should be checked against the current requirements of the Ministry of Environment, Water and Agriculture.
The regulatory framework covers activities such as drilling, deepening and cleaning wells and includes licensing requirements for water well drilling contractors.
Saudi requirements also address the protection of completed wells.
This means compliance extends beyond the pipe itself.
The drilling activity, contractor authorization, well completion and site protection can all form part of the regulatory requirements.
One common procurement mistake is treating a general statement such as "SASO standard" as a complete product specification.
A useful casing specification should identify the actual standard number and technical requirements.
For example, the procurement document may need to state:
The exact requirements should come from the approved well design and project documentation.
Depending on the product and project, international standards may also appear in water well casing specifications.
Examples encountered in the industry include standards covering PVC well casing, screens, dimensions or related performance requirements.
However, the presence of an ASTM, ISO, DIN or other international reference on a product data sheet does not by itself establish compliance with a Saudi project.
The consultant or project authority should confirm which standard is required.
Where a Saudi standard has adopted an international standard, the relevant Saudi designation and edition should also be checked.
Before placing an order, review the casing against a structured checklist.
| Parameter | What should be verified |
|---|---|
| Well depth | Final and installation depths |
| Casing material | PVC/uPVC, steel or specified alternative |
| Diameter | Compatibility with pump and well design |
| Wall specification | Required structural capacity |
| Collapse resistance | Suitability for external loading |
| Joint strength | Suitability for casing-string loads |
| Connection type | Threaded, welded or specified system |
| Screen interval | Based on borehole geology |
| Slot size | Compatible with formation and gravel pack |
| Open area | Appropriate for hydraulic design |
| Standard | Exact referenced document and edition |
| Certificates | Required test and compliance documentation |
| Saudi requirements | Current regulatory and project requirements |
A casing schedule should show how the well changes with depth rather than simply listing one pipe size for the entire borehole.
An illustrative format might look like this:
| Depth interval | Component | Purpose |
|---|---|---|
| Surface section | Plain casing | Stabilize and isolate upper formations |
| Intermediate section | Plain casing | Maintain borehole and isolate unwanted zones |
| Aquifer interval | Well screen | Allow groundwater entry |
| Lower section | Screen or plain casing according to design | Complete target interval |
| Bottom | Sump or end closure where specified | Complete casing string |
This is an example of documentation structure only. Actual depths and components must be determined from the well design and drilling results.
As borehole depth increases, casing selection generally requires more attention to structural loading, installation procedure and joint capacity.
For a relatively shallow borewell, a properly specified PVC/uPVC casing system may provide a practical solution.
For deeper or mechanically demanding installations, the engineer may need to evaluate heavier-duty PVC systems, steel casing or another approved solution.
The decision should be based on calculated and documented requirements rather than a fixed depth rule.
Groundwater chemistry should also be considered when selecting casing materials.
Relevant parameters can include:
PVC/uPVC offers corrosion resistance in many groundwater environments, while steel may require additional consideration of corrosion and protection.
Material compatibility should be reviewed for the actual water chemistry expected at the site.
Saudi projects can expose casing materials to high ambient temperatures and strong sunlight before installation.
Storage and handling therefore matter.
PVC/uPVC casing should be stored according to manufacturer instructions and protected from conditions that could cause deformation or unnecessary degradation before it enters the borehole.
Pipes should also be handled carefully during transport and installation to prevent damage to:
A casing string should be inspected before installation rather than assuming that delivered material remains undamaged.
Water well casing and column pipe perform different functions.
The casing forms the structural lining of the borehole.
The column or rising pipe carries pumped water from the submersible pump towards the surface.
A typical production well may therefore contain:
Borehole → casing and screen → submersible pump → column pipe → discharge system
The submersible cable supplies electrical power to the pump and is installed as part of the pumping arrangement.
These components should not be confused when preparing a well specification or bill of quantities.
For a Saudi water well project, procurement teams may need to request documentation such as:
The required documentation should match the project specification and approval process.
"200 mm PVC casing" does not provide enough information to determine whether a product is suitable.
Pipe designed for another application should not automatically be used in a borewell.
Casing loads depend on more than total well depth.
The connection is part of the casing system and must be suitable for the installation.
The actual applicable standard, technical requirements and project approvals should be identified.
Screen design should reflect the aquifer and filter-pack requirements.
Casing diameter should provide appropriate space for the selected pump, cable and installation requirements.
There is no single standard that should automatically be quoted for every PVC water well casing installation. The applicable requirements depend on the product, approved project specification, Saudi regulatory requirements and the standard referenced for the selected casing system. The exact SASO or other standard should be verified for the project rather than assumed.
SASO develops and adopts Saudi standards and technical requirements for products. Water well drilling and groundwater-well licensing are regulated through the relevant Saudi water authorities, including the Ministry of Environment, Water and Agriculture. Product standards and well-construction requirements should therefore be checked separately.
PVC/uPVC can be suitable for some deep-well applications when the casing system has adequate structural and joint capacity for the design conditions. Suitability should not be determined from depth alone.
Important factors include diameter, wall thickness, collapse resistance, tensile loading, joint capacity, groundwater conditions, borehole geometry and installation method.
It should not be assumed to be suitable. Purpose, dimensions, structural properties, joint design and applicable standards need to meet the well specification.
Diameter is influenced by required well yield, submersible pump size, installation clearance, column pipe, submersible cable and maintenance requirements.
Plain casing supports and isolates parts of the borehole. The well screen contains openings that allow groundwater to enter from selected aquifer intervals.
Water well drilling and related licensing requirements fall under the Saudi Ministry of Environment, Water and Agriculture and the applicable Saudi water regulatory framework.
Once the borehole design, required casing diameter, screen interval, groundwater conditions and structural requirements have been established, the casing should be selected as a purpose-built water-well system rather than as a generic PVC pipe.
For this application, Vinyl Pipes offers uPVC Casing Pipes specifically for water-well and borewell construction, with separate Medium Well Casing Pipes and Deep Well Casing Pipes for different installation conditions.
Vinyl Pipes manufactures its casing system from unplasticized polyvinyl chloride, with a stated yield stress of 55 N/mm². According to the manufacturer, the Deep Well Casing Pipe range is designed for installations reaching depths of up to 600 metres, while the Medium Well range is intended for moderate-depth borewells.
That distinction is important in the context of this guide. It does not mean that every uPVC casing can automatically be installed to 600 metres. It means that Vinyl Pipes provides a defined deep-well product for which the manufacturer states that depth capability. The final selection still needs to account for diameter, structural loading, borehole conditions, joint capacity and the approved well design.
Groundwater chemistry is an important consideration in Saudi well projects, particularly where salinity, dissolved minerals and varying pH conditions may affect casing materials.
Vinyl Pipes states that its uPVC casing products are resistant to corrosion and chemicals across a pH range of 2 to 12. Unlike metallic casing, uPVC does not depend on a protective metallic coating to provide its basic corrosion resistance.
This makes the product relevant where the project specification permits uPVC and the groundwater chemistry is compatible with the manufacturer's stated operating conditions.
Vinyl Pipes also identifies a smooth internal surface as a feature of its uPVC casing range. A smooth bore can support efficient water movement while reducing internal friction.
The comparatively lightweight construction of uPVC also simplifies transport and handling during well installation compared with heavier metallic alternatives. This can be useful on water-well projects where long casing strings must be transported, positioned and assembled at the drilling site.
The casing itself is only one part of the completed well.
Where groundwater needs to enter from the selected aquifer, Vinyl Pipes also provides Screen Pipes with precision-engineered slots intended to allow groundwater entry while helping filter sediments.
The screen should still be selected according to the formation particle-size distribution, gravel-pack design, required open area and hydraulic conditions discussed earlier in this guide.
Using a purpose-built screen does not remove the need for granulometric analysis. Instead, the analysis determines which screen configuration is appropriate for the actual aquifer.
For a production water well, the casing and screen ultimately need to work with the pumping equipment installed inside the completed borehole.
Vinyl Pipes categorizes both uPVC Casing Pipes and uPVC Column Pipes within its water-well product range. The casing forms and supports the well structure, while the column pipe performs the separate function of carrying pumped water from the submersible pump towards the surface.
This makes it possible to evaluate the water-well system as a combination of compatible components rather than treating the casing as an isolated pipe purchase.
| Well requirement | Vinyl Pipes solution | Role in the well |
|---|---|---|
| Moderate-depth well casing | uPVC Medium Well Casing Pipes | Supports and lines the borehole |
| Deep-well casing | uPVC Deep Well Casing Pipes | Purpose-built casing option for deeper installations |
| Aquifer intake section | Screen Pipes | Allows groundwater entry and helps control sediment |
| Pumped-water delivery | uPVC Column Pipes | Carries water from the submersible pump towards the surface |
Vinyl Pipes states that its Deep Well Casing Pipes can be used at depths up to 600 metres and that its casing material has a yield stress of 55 N/mm² and resistance across pH 2 to 12. These are useful product-selection parameters, but they should be assessed alongside the actual project loads, diameter, groundwater conditions, installation procedure and Saudi project requirements rather than used as standalone design criteria.
For Saudi water-well projects where uPVC casing is permitted by the approved specification, Vinyl Pipes therefore provides a purpose-designed casing and screen solution that can be evaluated against the engineering requirements of the borehole, rather than substituting a general-purpose PVC pipe for dedicated water-well casing.
Water well casing in Saudi Arabia should be specified as part of the complete borehole design rather than treated as a standard pipe purchase.
The correct casing depends on well depth, borehole conditions, diameter, structural loads, joint capacity, groundwater chemistry, screen design and the pumping equipment that will eventually operate inside the well.
Saudi compliance also needs to be approached correctly. SASO standards and technical documents can apply to products and specific aspects of well-related work, while water well drilling, licensing and construction requirements are governed through the relevant Saudi water regulatory framework.
For PVC/uPVC casing, there is no responsible way to state one universal maximum depth or one universal standard without identifying the actual product and project requirements.
Where the approved design calls for a purpose-built uPVC water-well system, Vinyl Pipes' Medium Well and Deep Well uPVC Casing Pipes, together with its Screen Pipes, provide product-specific options that can be evaluated against the required depth, structural conditions, groundwater chemistry and aquifer design.
A reliable specification should state the casing material, dimensions, structural requirements, connection system, screen configuration, applicable standard and required documentation. It should then be checked against the approved well design and current Saudi requirements before procurement and installation.
See also: Column Pipe Load Table for 60 Hz Submersible Pumps · Borewell Casing Pipe Guide: Deep Well vs Medium Well uPVC Casing
Need uPVC pipe for a well, dewatering or monitoring project? See the range or contact Vinyl Pipes with your diameter, depth and quantity.