Chemical manufacturing • blending • loading
Chemical & Power Generation Filtration
PARSWOOD™
Chemical & Power Generation / Application guide
Protect product quality.
Support plant reliability.
Explore eleven application routes across chemical manufacturing and power-generation utilities. See where particle filtration, adsorption and specialist fluid treatment serve different purposes.
Discuss Your Application ↗Select an application
Chemical production. Power-system protection.
Organic solvents • aqueous blends • specialty intermediates
Chemical distribution • process feeds • sensitive rinses
Adhesives • binders • polymer solutions • specialty resins
Reaction feed protection • insoluble catalyst carryover
Specialty chemicals • compatible solvents • product finishing
Steam / gas turbine auxiliaries • electrohydraulic control
Wind generation • pitch controls • auxiliary hydraulics
Gas-fired power • industrial gas turbines
Standby generation • diesel systems • fuel handling
Chemical-plant utilities • thermal power • steam systems
These are representative application routes, not customer case studies or complete plant designs. Product links identify candidates for technical review, not verified interchangeable replacements or complete treatment systems.
Particle filtration / qualified filtration dutyProcess, treatment or storageVerification or decision
Match the technology to the contamination.
Suspended particles
Debris, corrosion solids and process fines need a defined removal target. Gels and deformable particles require representative trials, not a pore-size label alone.
Dissolved constituents
Selected dissolved impurities may need adsorption or another separation process. Verify target removal, useful capacity and desired-product recovery in the actual liquid.
Unwanted liquid phases
Water in oil and liquid aerosols in gas need phase-specific equipment. A particle cartridge does not automatically provide coalescence, dehydration or condensation control.
Chemical manufacturing • blending • loading
Bulk chemicals & final transfer
Rust, packaging debris and process solids can enter liquids during storage and transfer. Define whether the duty protects downstream equipment or controls particles in a finished product; the same filter need not suit both.
Representative process mapRead in numbered order
- 01Incoming supplyReview feed and delivery history
- 02Receiving guardIntercept specified incoming solids
- 03Storage / blendingMaintain batch identity and mixing needs
- 04Final polishingMeet a defined particle requirement
- 05Release checkSample against the product specification
- 06Transfer / fillingProtect quality through delivery
Off-spec material → controlled hold or approved rework, not automatic shipment. Receiving and final polishing are separate selection points; either may be unnecessary if the process evidence supports its omission.
Conceptual treatment logic. Pumping, valves, controls and protective devices are not fully shown. Not an installation drawing.
Filtration stages & selection
| Stage | Purpose | Approach to evaluate |
|---|---|---|
| Receiving guard | Protect the receiving process. | Evaluate bags or cartridges against debris loading and required protection. |
| Final polish | Control the remaining particle burden. | Review pleated PP or an exact high-flow model after chemistry and flow checks. |
| Batch release | Confirm the specified product quality. | Include relevant chemical attributes; clear appearance alone is not a release test. |
Process information to review
Chemical identity and concentration; batch or continuous duty; viscosity at operating temperature; solids load; outlet particle requirement; peak transfer flow; cleaning fluids.
PARSWOOD™ product candidates
Relevant documents & trial evidence
Request the selected element’s retention test, flow/pressure-loss data, full wetted materials, seal details, temperature and differential-pressure limits, cleaning compatibility and relevant contact documentation. Pair these with the receiving process or equipment’s acceptance specification.
Agree feed and outlet sampling, flow, pressure difference, useful throughput and replacement criteria before trial. A product page is not a substitute for missing grade-specific documentation.
Organic solvents • aqueous blends • specialty intermediates
Solvents & fine-chemical polishing
Solvent clarity, particle burden and dissolved purity are different measures. A particulate filter may remove insoluble contamination while leaving dissolved colour, water or trace chemical impurities unchanged.
Representative process mapRead in numbered order
- 01Feed assessmentIdentify solvent blend and impurities
- 02Coarse protectionUse where loading requires it
- 03Purification stepUse separately specified treatment if needed
- 04Particle polishSelect compatible media and seals
- 05Quality testMeasure the attributes needed by the user
- 06Protected deliveryPrevent downstream recontamination
A purification step may involve a separately engineered separation. Particle polishing does not substitute for distillation, drying or a dissolved-impurity specification.
Conceptual treatment logic. Pumping, valves, controls and protective devices are not fully shown. Not an installation drawing.
Filtration stages & selection
| Stage | Purpose | Approach to evaluate |
|---|---|---|
| Feed protection | Reduce premature loading of finer media. | Stage filtration only where incoming solids justify it. |
| Fine filtration | Control insoluble contamination. | Consider nylon 66 or PP only after full solvent-blend compatibility review. |
| Purity assurance | Check contamination from the filter itself. | Request extractables information and establish a suitable conditioning and sampling plan. |
Process information to review
Full solvent composition; dissolved versus particulate targets; acceptable extractables; temperature; viscosity; seal material; flow and pressure; site requirements for handling the liquid.
PARSWOOD™ product candidates
Relevant documents & trial evidence
Request the selected element’s retention test, flow/pressure-loss data, full wetted materials, seal details, temperature and differential-pressure limits, cleaning compatibility and relevant contact documentation. Pair these with the receiving process or equipment’s acceptance specification.
Agree feed and outlet sampling, flow, pressure difference, useful throughput and replacement criteria before trial. A product page is not a substitute for missing grade-specific documentation.
Chemical distribution • process feeds • sensitive rinses
Acids, alkalis & demanding process chemicals
Concentration, temperature and impurities can change how a chemical attacks a filter. Begin with a complete wetted-material review rather than assuming that a plastic cartridge or metal housing is universally compatible.
Representative process mapRead in numbered order
- 01Chemical specificationInclude concentration and upset conditions
- 02Materials reviewCheck every wetted component
- 03Qualified containmentSelect a documented vessel and connections
- 04Particle controlUse media qualified for the actual duty
- 05Outlet verificationCheck particles and relevant purity attributes
- 06Receiving operationMaintain the approved service envelope
Cleaning and flushing liquids belong in the compatibility assessment. A chemically resistant filter medium does not establish compatibility of its seals, adhesives, supports or housing.
Conceptual treatment logic. Pumping, valves, controls and protective devices are not fully shown. Not an installation drawing.
Filtration stages & selection
| Stage | Purpose | Approach to evaluate |
|---|---|---|
| Compatibility gate | Avoid selecting from the liquid name alone. | Review concentration, temperature, exposure time and all cleaning formulations. |
| Particle stage | Meet the required removal performance. | A PP cartridge may be a candidate for some duties; no universal acid, caustic or oxidizer approval is implied. |
| High-purity boundary | Avoid introducing unacceptable contamination. | Semiconductor-grade or comparable purity needs additional materials and extractables evidence. |
Process information to review
Chemical composition including impurities; operating and upset temperature; pressure; required ionic/organic purity; materials restrictions; cleaning protocol; site equipment requirements.
PARSWOOD™ product candidates
Relevant documents & trial evidence
Request the selected element’s retention test, flow/pressure-loss data, full wetted materials, seal details, temperature and differential-pressure limits, cleaning compatibility and relevant contact documentation. Pair these with the receiving process or equipment’s acceptance specification.
Agree feed and outlet sampling, flow, pressure difference, useful throughput and replacement criteria before trial. A product page is not a substitute for missing grade-specific documentation.
Adhesives • binders • polymer solutions • specialty resins
Resins, polymer solutions & gels
Gels and deformable particles can behave differently from rigid test particles. Viscosity and product temperature also affect pressure loss, making a water-based flow estimate insufficient for a resin application.
Representative process mapRead in numbered order
- 01Prepared solutionConfirm batch and temperature
- 02Coarse screeningRemove large debris where appropriate
- 03Gel / particle trialEvaluate media with representative product
- 04Quality assessmentCheck gels, appearance and product function
- 05Final transferMaintain approved conditions
- 06Packing / usePreserve accepted product quality
Rejected or off-spec product → approved rework assessment. This route describes pumpable solutions and blends, not molten-polymer filtration; melts need a separate high-temperature equipment review.
Conceptual treatment logic. Pumping, valves, controls and protective devices are not fully shown. Not an installation drawing.
Filtration stages & selection
| Stage | Purpose | Approach to evaluate |
|---|---|---|
| Loading stage | Handle large contaminants before fine polishing. | Assess a compatible bag or coarse element where useful. |
| Fine stage | Control the defects relevant to the product. | Trial pleated media using representative gels, viscosity and pressure conditions. |
| Product integrity | Avoid removing desired constituents. | Compare product function and composition as well as visual clarity. |
Process information to review
Resin/solvent formulation; viscosity-temperature relationship; gel or defect description; desired particle content; flow range; allowable pressure loss; current element life.
PARSWOOD™ product candidates
Relevant documents & trial evidence
Request the selected element’s retention test, flow/pressure-loss data, full wetted materials, seal details, temperature and differential-pressure limits, cleaning compatibility and relevant contact documentation. Pair these with the receiving process or equipment’s acceptance specification.
Agree feed and outlet sampling, flow, pressure difference, useful throughput and replacement criteria before trial. A product page is not a substitute for missing grade-specific documentation.
Reaction feed protection • insoluble catalyst carryover
Catalyst-feed protection & catalyst fines
Feed protection and downstream catalyst recovery solve different problems. Unwanted feed particles can foul a catalyst bed; insoluble catalyst fines after a reactor may require a recovery system rather than disposable polishing alone.
Representative process mapRead in numbered order
- 01Feed characterizationIdentify solids and unwanted phases
- 02Feed guardRemove specified incoming particles
- 03Reaction stageOperate the separately designed process
- 04Primary separationRecover bulk solids if applicable
- 05Fines polishingEvaluate residual insoluble carryover
- 06Product checkConfirm catalyst and product requirements
Primary separated solids → an approved recovery or waste route. The diagram does not imply all reactors discharge catalyst solids. Dissolved catalyst species are outside ordinary particle-filtration capability.
Conceptual treatment logic. Pumping, valves, controls and protective devices are not fully shown. Not an installation drawing.
Filtration stages & selection
| Stage | Purpose | Approach to evaluate |
|---|---|---|
| Upstream guard | Protect the receiving catalyst system. | Use the reactor supplier’s contamination limits and actual feed chemistry. |
| Bulk recovery | Manage a substantial catalyst load. | Assess suitable recoverable or cleanable separation equipment; no catalogue system is preselected here. |
| Residual fines | Control a manageable insoluble carryover. | PP or bag candidates require evidence for chemistry, particle size and acceptable catalyst loss. |
Process information to review
Catalyst form; solid versus dissolved species; particle distribution; loading and value; feed/product chemistry; temperature; recovery objective; outlet acceptance test.
PARSWOOD™ product candidates
Relevant documents & trial evidence
Request the selected element’s retention test, flow/pressure-loss data, full wetted materials, seal details, temperature and differential-pressure limits, cleaning compatibility and relevant contact documentation. Pair these with the receiving process or equipment’s acceptance specification.
Agree feed and outlet sampling, flow, pressure difference, useful throughput and replacement criteria before trial. A product page is not a substitute for missing grade-specific documentation.
Specialty chemicals • compatible solvents • product finishing
Colour & adsorbable-impurity control
Adsorption targets selected dissolved compounds; particle filtration targets suspended material. Carbon performance depends on the liquid and impurity, and it can also remove wanted components from a formulation.
Representative process mapRead in numbered order
- 01Feed characterizationIdentify the actual colour or impurity target
- 02Solids pretreatmentReduce interfering particle load if needed
- 03Adsorption trialEvaluate a compatible carbon medium
- 04Particle safeguardAdd downstream protection if the trial requires it
- 05Release testingCheck target removal and product recovery
- 06Accepted batchTransfer under controlled conditions
Spent carbon → appropriate waste handling. Monitor treatment capacity and replacement criteria; a clean pressure reading does not demonstrate remaining adsorption capacity.
Conceptual treatment logic. Pumping, valves, controls and protective devices are not fully shown. Not an installation drawing.
Filtration stages & selection
| Stage | Purpose | Approach to evaluate |
|---|---|---|
| Trial design | Measure the relevant dissolved target. | Compare treated and untreated samples using a defined analytical or colour method. |
| Carbon candidate | Evaluate removal and useful throughput. | Review the PARSWOOD™ pleated activated-carbon cartridge in the actual liquid. |
| Quality safeguard | Check for unwanted changes. | Measure product loss, carbon shedding and other relevant formulation attributes. |
Process information to review
Target compound or colour test; concentration range; solvent; viscosity; temperature; acceptable yield loss; required throughput; rinsing constraints; disposal route.
PARSWOOD™ product candidates
Relevant documents & trial evidence
Request the selected element’s retention test, flow/pressure-loss data, full wetted materials, seal details, temperature and differential-pressure limits, cleaning compatibility and relevant contact documentation. Pair these with the receiving process or equipment’s acceptance specification.
Agree feed and outlet sampling, flow, pressure difference, useful throughput and replacement criteria before trial. A product page is not a substitute for missing grade-specific documentation.
Steam / gas turbine auxiliaries • electrohydraulic control
Turbine lubrication & control fluids
Lubrication and control-fluid circuits need equipment-specific cleanliness requirements. Particles, water, oxidation products and varnish-related material are distinct problems and may require different treatment technologies.
Representative process mapRead in numbered order
- 01Reservoir assessmentIdentify fluid and contamination trends
- 02Main circulationMaintain the equipment’s required supply
- 03Qualified in-line filterUse the specified element and bypass design
- 04Bearings / controlsSupply the protected machine
- 05Return circuitReturn fluid to the reservoir
- 06Condition monitoringReview particles, water and fluid health
Optional parallel branch: reservoir → purpose-selected offline treatment → reservoir. Water removal or varnish treatment is selected separately from the main particle filter and does not replace required circulation.
Conceptual treatment logic. Pumping, valves, controls and protective devices are not fully shown. Not an installation drawing.
Filtration stages & selection
| Stage | Purpose | Approach to evaluate |
|---|---|---|
| Main filtration | Maintain equipment protection. | Match dimensions, efficiency, collapse strength, bypass and operating limits to the machine requirements. |
| Offline treatment | Address the measured contamination. | Water removal and varnish-control equipment are separate selection tasks. |
| Catalogue boundary | Avoid an unsupported substitution. | No reviewed general-purpose liquid cartridge is established here as a turbine-oil or control-fluid replacement. |
Process information to review
Machine and installed element details; lubricant or control-fluid type; cold-start viscosity; flow and pressure; cleanliness target; water and varnish indicators; bypass arrangement.
PARSWOOD™ product candidates
No standard catalogue replacement is established for this duty. Submit the actual service conditions for review.
Relevant documents & trial evidence
Request the selected element’s retention test, flow/pressure-loss data, full wetted materials, seal details, temperature and differential-pressure limits, cleaning compatibility and relevant contact documentation. Pair these with the receiving process or equipment’s acceptance specification.
Agree feed and outlet sampling, flow, pressure difference, useful throughput and replacement criteria before trial. A product page is not a substitute for missing grade-specific documentation.
Wind generation • pitch controls • auxiliary hydraulics
Wind gearboxes & hydraulic systems
Gearbox lubrication and hydraulic control have different duty cycles and filtration requirements. An element that fits physically can still differ in pressure behaviour, media performance or bypass characteristics.
Representative process mapRead in numbered order
- 01System identificationSeparate gearbox from hydraulic duty
- 02Reservoir / sumpAssess oil condition and ingress paths
- 03Designed circulationFollow the machine’s lubrication arrangement
- 04Qualified filtrationMatch the specified element function
- 05Protected equipmentMaintain required flow and lubrication
- 06Trend reviewTrack oil and element condition
Return ↺ the relevant reservoir. Any offline branch, breather or water-removal system must be evaluated separately; this map does not prescribe one arrangement for all turbines.
Conceptual treatment logic. Pumping, valves, controls and protective devices are not fully shown. Not an installation drawing.
Filtration stages & selection
| Stage | Purpose | Approach to evaluate |
|---|---|---|
| Element identification | Establish the actual replacement duty. | Provide the original part number, drawing and performance specification. |
| Operating envelope | Consider starting and changing loads. | Review cold viscosity, pressure cycling, bypass and service access. |
| Condition control | Investigate contamination causes. | Use oil-analysis trends to distinguish filtration needs from fluid degradation or ingress. |
Process information to review
Equipment model; oil type; installed element specification; cold and normal conditions; differential-pressure history; water/particle analysis; maintenance intervals.
PARSWOOD™ product candidates
No standard catalogue replacement is established for this duty. Submit the actual service conditions for review.
Relevant documents & trial evidence
Request the selected element’s retention test, flow/pressure-loss data, full wetted materials, seal details, temperature and differential-pressure limits, cleaning compatibility and relevant contact documentation. Pair these with the receiving process or equipment’s acceptance specification.
Agree feed and outlet sampling, flow, pressure difference, useful throughput and replacement criteria before trial. A product page is not a substitute for missing grade-specific documentation.
Gas-fired power • industrial gas turbines
Fuel-gas conditioning
Particles and entrained liquid droplets in fuel gas can affect downstream equipment. Solid removal, aerosol coalescence and control of condensation are separate design considerations.
Representative process mapRead in numbered order
- 01Supply reviewEstablish gas composition and envelope
- 02Bulk liquid removalInclude where the feed requires it
- 03Qualified gas filtrationControl solids and aerosols with selected equipment
- 04Liquid drainageHandle collected liquids through designed controls
- 05Delivery verificationCheck quality and downstream conditions
- 06Turbine fuel systemMeet the receiving equipment specification
Separated liquids → a controlled collection route. Downstream pressure or temperature changes may create new condensation; upstream filtration alone does not establish dry gas at every point.
Conceptual treatment logic. Pumping, valves, controls and protective devices are not fully shown. Not an installation drawing.
Filtration stages & selection
| Stage | Purpose | Approach to evaluate |
|---|---|---|
| Feed assessment | Identify solids, aerosols and bulk liquid. | Assess the actual gas stream and turbine fuel specification. |
| Separation stage | Provide the required gas-service performance. | Use purpose-designed pressure equipment and documented gas filtration/coalescence data. |
| Product boundary | Avoid category confusion. | General liquid cartridges and commercial HVAC filters are not established substitutes for fuel-gas equipment. |
Process information to review
Gas composition; flow basis; pressure/temperature range; liquid loading; dew-point information; solids data; receiving specification; drain and vessel requirements.
PARSWOOD™ product candidates
No standard catalogue replacement is established for this duty. Submit the actual service conditions for review.
Relevant documents & trial evidence
Request the selected element’s retention test, flow/pressure-loss data, full wetted materials, seal details, temperature and differential-pressure limits, cleaning compatibility and relevant contact documentation. Pair these with the receiving process or equipment’s acceptance specification.
Agree feed and outlet sampling, flow, pressure difference, useful throughput and replacement criteria before trial. A product page is not a substitute for missing grade-specific documentation.
Standby generation • diesel systems • fuel handling
Liquid-fuel storage & transfer
Storage, transfer and final engine filtration are distinct protection points. Particle contamination and free or emulsified water need different removal mechanisms; dissolved water is a further distinction.
Representative process mapRead in numbered order
- 01Stored fuelAssess contamination and fuel identity
- 02Transfer / polishingUse the designed fuel-handling circuit
- 03Particle protectionSelect a qualified fuel-service filter
- 04Water separationUse a stage suited to the water state
- 05Fuel-quality checkVerify acceptance before delivery
- 06Engine final protectionRetain the engine-specified filter system
Separated water → controlled waste collection. Filter/separator order and whether stages are combined depend on equipment design; storage polishing does not eliminate the engine’s final filters.
Conceptual treatment logic. Pumping, valves, controls and protective devices are not fully shown. Not an installation drawing.
Filtration stages & selection
| Stage | Purpose | Approach to evaluate |
|---|---|---|
| Bulk particle control | Manage contamination from storage and handling. | Select from fuel-service performance data rather than a water micron rating. |
| Water removal | Address the measured water form. | Confirm separator compatibility with the fuel formulation; no universal emulsified-water claim is implied. |
| Final protection | Maintain the engine requirement. | No reviewed catalogue cartridge is preselected as a qualified engine or bulk-fuel replacement. |
Process information to review
Fuel specification and blend; storage condition; flow; temperature; water form and concentration; particle results; installed separator; engine requirements.
PARSWOOD™ product candidates
No standard catalogue replacement is established for this duty. Submit the actual service conditions for review.
Relevant documents & trial evidence
Request the selected element’s retention test, flow/pressure-loss data, full wetted materials, seal details, temperature and differential-pressure limits, cleaning compatibility and relevant contact documentation. Pair these with the receiving process or equipment’s acceptance specification.
Agree feed and outlet sampling, flow, pressure difference, useful throughput and replacement criteria before trial. A product page is not a substitute for missing grade-specific documentation.
Chemical-plant utilities • thermal power • steam systems
Cooling, boiler makeup & condensate
Plant water is a family of services. Cool makeup water, recirculating cooling water and hot condensate must not share an unqualified filter selection simply because all are water streams.
Representative process mapRead in numbered order
- 01Identify water dutySeparate makeup, cooling and condensate
- 02Analyze contaminationMeasure suspended and dissolved species
- 03Select treatment routeDefine the required water-quality functions
- 04Qualified particle stageApply within documented service limits
- 05Quality verificationCheck the receiving-system specification
- 06Receiving systemMaintain its chemistry programme
Cooling side stream ↺ cooling loop. Boiler makeup → specified purification and feedwater conditioning. Condensate → acceptance or diversion before return. These are alternative routes, not one serial circuit.
Conceptual treatment logic. Pumping, valves, controls and protective devices are not fully shown. Not an installation drawing.
Filtration stages & selection
| Stage | Purpose | Approach to evaluate |
|---|---|---|
| Cool makeup | Protect downstream purification. | PP or high-flow cartridges can be reviewed for the actual pretreatment conditions. |
| Cooling water | Manage suspended solids. | A side stream supplements rather than replaces scale, corrosion and microbiological control. |
| Hot condensate | Control return quality and corrosion products. | Request service-specific equipment; standard cool-water elements are not prequalified. |
Process information to review
Water analysis; exact duty; flow and thermal envelope; chemistry and additives; receiving limits; current treatment; monitoring and diversion arrangements.
PARSWOOD™ product candidates
Relevant documents & trial evidence
Request the selected element’s retention test, flow/pressure-loss data, full wetted materials, seal details, temperature and differential-pressure limits, cleaning compatibility and relevant contact documentation. Pair these with the receiving process or equipment’s acceptance specification.
Agree feed and outlet sampling, flow, pressure difference, useful throughput and replacement criteria before trial. A product page is not a substitute for missing grade-specific documentation.
Product fit / evidence review
PARSWOOD™ candidates for selected chemical & water duties
Size 2 nominal filter bags
Coarse or intermediate solids control in compatible process liquids.
The catalogue offers polypropylene, polyester and nylon options. These are nominal bags; material choice is part of the selection.
Confirm fluid compatibility, temperature, sealing and basket support. A nominal rating does not establish protection against every particle above the stated size.
View product specifications →Pleated polypropylene cartridges
Fine particle polishing in selected chemical and water duties.
The listing identifies polypropylene construction and fine-chemical, plating-chemical and process-water applications.
Verify the exact grade’s retention test, seal, flow curve and complete chemical compatibility. Do not extrapolate a water pressure-loss curve to a viscous resin.
View product specifications →Hydrophilic nylon 66 cartridges
Particle filtration trials in compatible solvent or aqueous co-solvent systems.
The catalogue lists organic-solvent and aqueous co-solvent applications alongside beverage duties.
A broad solvent application is not approval for every blend, acid or oxidizer. Confirm all wetted materials, extractables and performance in the actual fluid.
View product specifications →PARSWOOD™ pleated activated-carbon cartridges
Trials for colour and selected adsorbable impurities in compatible liquids.
The listing describes carbon-impregnated cellulose media with polypropylene components and includes solvent and specialty-chemical applications.
Determine adsorption capacity, desired-product loss, rinsing and carbon shedding by trial. Do not treat the published micron grade as a dissolved-contaminant removal guarantee.
View product specifications →High-flow pleated cartridges
Selected higher-flow chemical blending and plant-water duties.
The catalogue covers multiple constructions and formats and lists chemical blending, cooling water and boiler makeup applications.
Identify the exact model. These listings do not establish a qualified fuel-gas coalescer, hydraulic element or hot-condensate replacement.
View product specifications →Filter housings
Containment selected together with the element and fluid.
Review the vessel drawing, wetted materials, sealing, drainage, isolation and maintenance access.
Request the applicable pressure/temperature documentation and installation requirements. A stainless-steel housing description is not proof of suitability for every chemical or hazardous service.
View product specifications →Prepare a useful application review
Provide the complete fluid composition, contamination target, flow profile, service conditions and installed element or housing drawing. The linked catalogue pages do not establish availability of every required certificate or validation report.
Related applications
Specialist turbine oil, hydraulic and fuel duties have no prequalified catalogue replacement in this guide. Nuclear safety-related service, molten polymers and gas-turbine inlet filtration require separate qualification.