Startup Pipeline Protection
Temporary Strainer Manufacturer
BCST Valve manufactures temporary strainers for removing welding slag, scale, rust and construction debris during pipeline flushing, commissioning and startup.
Temporary strainers are installed between pipe flanges for a defined operating period. Their compact construction provides economical equipment protection before the permanent filtration system enters normal service.
- Conical, truncated-cone and flat plate designs
- Metric and ASME flange-compatible configurations
- Perforated plate and mesh-lined elements
- Carbon steel and stainless steel options
- Custom dimensions and filtration openings
Startup Protection
Captures construction debris before it reaches critical equipment.
Compact Installation
Fits between pipeline flanges without a permanent housing.
Custom Filtration
Opening size and element area can match commissioning requirements.
Visible Identification
An external handle helps identify the installed temporary element.
Product Collection
Temporary Strainer Types
Select the shape, flow direction and filtration area according to the pipeline and startup conditions.
Conical Temporary Strainer
A cone-shaped element that provides more filtration area than a flat plate within a compact flange-mounted arrangement.
- Pointed or truncated-cone construction
- Perforated plate support
- Optional wire mesh lining
Flat Plate Temporary Strainer
A simple circular screen installed between flanges where axial space is limited and coarse startup protection is required.
- Minimal installation length
- Simple economical construction
- Suitable for low debris loading
Truncated-Cone Strainer
A flat-ended cone configuration that combines useful filtration area with reduced overall element length.
- Shorter than a pointed cone
- Reinforced construction options
- Suitable for larger pipelines
Temporary Basket Strainer
A cylindrical or basket-shaped element for applications requiring additional filtration area and dirt-holding capacity.
- Extended filtration surface
- Perforated or mesh-lined construction
- Project-specific support arrangement
Reverse-Cone Temporary Strainer
A cone installed in the opposite orientation when flow direction, pressure loading or available space requires it.
- Alternative cone orientation
- Flow-direction review required
- Reinforced element options
Custom Temporary Strainer
A project-specific element for special flange dimensions, screen openings, materials or startup conditions.
- Custom filtration area
- Special material combinations
- Alternative handle and support designs
Product Comparison
Choose the Appropriate Temporary Strainer
The preferred configuration depends on available space, required filtration area, debris loading and allowable pressure drop.
| Strainer Type | Filtration Area | Required Axial Space | Dirt-Holding Capacity | Typical Application |
|---|---|---|---|---|
| Pointed Conical Strainer | عالية | عالية | عالية | Pipeline flushing and startup |
| Truncated-Cone Strainer | Medium to high | متوسط | Medium to high | Limited-length pipeline sections |
| Flat Plate Strainer | منخفضة | Minimal | منخفضة | Coarse filtration with low debris loading |
| Temporary Basket Strainer | عالية | Medium to high | عالية | Higher-flow startup filtration |
| Reverse-Cone Strainer | عالية | عالية | عالية | Alternative flow or support arrangement |
| Custom Temporary Strainer | Project specific | Project specific | Project specific | Special commissioning requirements |
Operating Principle
How a Temporary Strainer Works
The temporary strainer is clamped between two pipe flanges. Process fluid passes through the perforated or mesh-lined element while debris remains on its upstream surface.
- The element is installed before flushing or startup.
- Fluid enters the open side of the strainer.
- Construction debris is retained by the screen.
- Filtered fluid continues toward downstream equipment.
- Differential pressure increases as debris accumulates.
- The element is removed when the temporary duty is complete.
Debris Loading
Determines the required screen area and inspection frequency.
Screen Opening
Must protect equipment while allowing the required startup flow.
الضغط التفاضلي
The element must withstand the specified clean and dirty conditions.
Installation Length
Cone length must fit safely inside the available pipe section.
Technical Options
Temporary Strainer Configuration Guide
Available options depend on the pipeline, startup procedure and downstream equipment requirements.
| المعلمة | Typical Options | Information Required |
|---|---|---|
| Element Shape | Pointed cone, truncated cone, basket or flat plate | Available space and required filtration area |
| تثبيت | Between raised-face or ring-joint flanges | Flange dimensions and facing |
| Screen Construction | Perforated plate, wire mesh or combined construction | Particle size and required strength |
| Screen Material | Carbon steel, SS304, SS316 or project-specified alloy | Fluid compatibility and corrosion conditions |
| Filtration Direction | Inside-to-outside or outside-to-inside | Flow direction and structural loading |
| Identification Handle | Plain, stamped or tagged | Site identification requirements |
| Support | Standard or reinforced construction | Maximum differential pressure |
| التوثيق | Drawing, material record and inspection report | Agreed project scope |
Screen Selection
Opening Size and Effective Filtration Area
Temporary strainer design should balance debris retention, open area, mechanical strength and allowable startup pressure drop.
Screen Construction Options
- Perforated plate for coarse debris
- Wire mesh for smaller particles
- Mesh supported by perforated plate
- Single-layer or multi-layer construction
- Reinforced element for higher differential pressure
Selection Considerations
- Smallest debris that could damage equipment
- Expected amount of construction debris
- Required flushing and startup flow rate
- Maximum allowable pressure drop
- Available cone length and pipeline clearance
| Screen Type | Filtration Characteristic | Relative Strength | Typical Use |
|---|---|---|---|
| Perforated Plate | Coarse filtration | عالية | Weld slag, scale and large debris |
| Mesh-Lined Plate | Medium or fine filtration | Supported | Pumps, valves and meters |
| Multi-Layer Element | Project-specific filtration | Design dependent | Special commissioning requirements |
| Reinforced Element | Coarse or fine filtration | Very high | Higher differential-pressure conditions |
Size Reference
Pointed Conical Temporary Strainer Dimensions
Selected metric catalog dimensions are provided for preliminary planning. Confirm the approved drawing before fabrication or installation.
| Nominal Size | Typical Flange Outside Reference | Cone Diameter | Cone Height | Plate Thickness |
|---|---|---|---|---|
| DN25 | 62-70 mm | 26 mm | 90 mm | 2 mm |
| DN50 | 94-105 mm | 55 mm | 130 mm | 2 mm |
| DN80 | 132-142 mm | 92 mm | 150 mm | 2 mm |
| DN100 | 152-162 mm | 113 mm | 160 mm | 2 mm |
| DN150 | 206-218 mm | 172 mm | 210 mm | 3 mm |
| DN200 | 262-282 mm | 242 mm | 240 mm | 3 mm |
| DN300 | 370-395 mm | 363 mm | 300 mm | 3 mm |
| DN400 | 470-510 mm | 479 mm | 365 mm | 6 mm |
| DN500 | 575-616 mm | 600 mm | 430 mm | 6 mm |
| DN600 | 676-726 mm | 714 mm | 490 mm | 6 mm |
Dimensions vary with pressure class, flange standard and element design. Final dimensions must follow the approved project drawing.
المواد
Material Options for Pipeline Conditions
Plate, mesh, reinforcement and identification materials should be selected according to the medium, temperature, corrosion risk and startup duration.
| المكوّن | Typical Material Options |
|---|---|
| Perforated Element | Carbon steel, SS304, SS304L, SS316 or SS316L |
| Wire Mesh | SS304, SS304L, SS316 or SS316L |
| Reinforcement | Material compatible with the primary element |
| Flange Ring | Carbon steel or stainless steel |
| Identification Handle | Carbon steel or stainless steel |
Selection Checklist
Information Required for Temporary Strainer Selection
Complete startup and pipeline data allows the manufacturer to review element shape, filtration area, strength and installation dimensions.
Process Data
- Flushing or process medium
- Design pressure and temperature
- Startup pressure and temperature
- Normal and maximum flow rates
- Expected installation duration
Filtration Data
- Required perforation or mesh size
- Expected debris type and quantity
- انخفاض الضغط المسموح به
- Required filtration-area ratio
- Maximum differential pressure
Piping Data
- Nominal pipe size
- Flange standard and pressure class
- Flange facing and gasket dimensions
- Available internal pipe length
- Flow direction and installation orientation
التطبيقات
Temporary Strainer Applications
Temporary strainers protect newly installed or serviced equipment during flushing, commissioning and initial operation.
النفط والغاز
Startup protection for pumps, compressors, meters and process equipment.
المعالجة الكيميائية
Commissioning filtration for chemical and process-fluid pipelines.
توليد الطاقة
Debris protection during flushing of steam, water and auxiliary systems.
مصافي التكرير
Initial pipeline protection for refinery units and transfer systems.
Manufacturer Quality Control
Inspection Before Delivery
The inspection scope depends on the selected temporary strainer construction and agreed project requirements.
- Review the approved datasheet and fabrication drawing.
- Verify plate, mesh and reinforcement materials.
- Inspect flange-ring and element dimensions.
- Check perforation or mesh opening size.
- Inspect welding, reinforcement and identification markings.
- Review cleanliness, documentation and protective packing.
Installation & Removal
Use Temporary Strainers Safely
The installation procedure should define orientation, pressure monitoring, inspection frequency and removal after commissioning.
Installation Guidelines
- Verify flow direction before installing the element.
- Confirm that the cone fits inside the downstream pipe.
- Use gaskets suitable for the flange and process conditions.
- Keep the identification handle visible outside the flanges.
- Provide pressure monitoring across the strainer.
- Record the installed location and removal plan.
Inspection and Removal
- Monitor differential pressure during flushing and startup.
- Reduce flow or isolate the line if pressure drop rises excessively.
- Depressurize and drain the pipeline before removal.
- Inspect the element for deformation or damage.
- Remove the temporary strainer after its defined duty.
- Install the correct permanent gasket before closing the flanges.
Send Us Your Temporary Strainer Data
Provide the pipe size, flange standard, startup flow, medium, screen opening, differential pressure and available installation length. BCST Valve will recommend a suitable temporary strainer.
الأسئلة المتداولة
Temporary Strainer FAQ
Answers to common questions from engineers, commissioning teams and procurement specialists.
What is a temporary strainer?
A temporary strainer is a removable pipeline screen used during flushing, commissioning or startup to protect equipment from construction debris.
How is it different from a permanent strainer?
A temporary strainer has no permanent service housing and is normally removed after startup. A permanent strainer is designed for repeated in-service cleaning.
When should a conical strainer be selected?
A conical strainer is useful when greater filtration area and dirt-holding capacity are required than a flat plate can provide.
When should a flat plate strainer be used?
A flat plate is suitable where installation length is limited and the expected debris loading is relatively low.
Which direction should the cone point?
Orientation depends on the flow direction, support construction and design differential pressure. Follow the approved drawing and installation instructions.
How is the screen opening selected?
Select an opening small enough to protect downstream equipment while maintaining acceptable startup flow and pressure drop.
How is blockage detected?
Pressure readings upstream and downstream of the strainer can indicate increasing differential pressure as debris accumulates.
Can a temporary strainer remain permanently installed?
It should normally be removed after its defined duty unless the pipeline and element have been specifically reviewed for continued service.
Can BCST Valve manufacture custom dimensions?
Project-specific flange rings, cone lengths, filtration areas, screen openings and materials can be reviewed against the submitted pipeline data.
What information is required for a quotation?
Provide the pipe size, flange details, pressure, temperature, medium, flow rate, screen opening, differential pressure and installation length.
Need Help Selecting a Temporary Strainer?
Send your pipeline and commissioning data to BCST Valve for technical selection and quotation support.
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