Specify the members that carry and locate a mist-eliminator assembly: support beams, frames, spacers and retaining rails designed around the equipment interfaces.
Drawing-led review of pultruded FRP support and locating members, with agreed cutting, drilling and surface treatment. Custom lamella geometry can be assessed as a separate qualification item. This inquiry does not include an independently guaranteed separator or pressure vessel.
A specified glass-fiber thermoset laminate with exposure-qualified resin and surface protection. Directional mechanical properties, service temperature and any required electrostatic behavior must be established for the proposed construction.
Start the purchase description with a function and a drawing revision. A beam carrying several vane modules, a rail maintaining vane pitch and a hold-down restraining a mesh pad have different critical dimensions. Identify contact faces, fastening points and areas that must remain clear for gas flow or drainage.
For a packing support, provide the packing system and its support design instead of substituting a generic open grating. The opening pattern must retain the selected packing while meeting process requirements. The vessel ledge and any intermediate supports belong in the interface drawing, even if they are supplied by another contractor.
ReferencesSulzer: vane geometry, drainage and gas-flow directionKoch-Glitsch: plastic packing and column internals
Specify section dimensions, cut length, straightness, twist and hole datums. Use agreed tolerances for locating features that accumulate across a bank. Mark slotted holes and adjustment allowances explicitly; unplanned field drilling can weaken a connection or interfere with a required seal.
Pultrusion suits the continuous member. Curved perimeter pieces, three-dimensional transitions and complex end fittings may need separate fabrication. Define where machining removes the original surface protection and state the approved edge treatment. Include a first-article assembly check when a new section mates with existing modules or brackets.
ReferencesRöchling: pultrusion process and reinforcement choicesASTM D3917-23: dimensional tolerances of pultruded shapesINEOS Composites: Derakane resin selection guide
Provide normal and upset conditions for gas, condensate, wash liquid and cleaning. Ask the material reviewer to address the exact surface construction rather than approving a resin family by name. Where laboratory qualification is needed, document specimen construction and the retained properties required after exposure.
The structural schedule should include the supported assembly, retained liquid, deposits and relevant pressure or cleaning loads. Supply span, restraint, allowable movement and design temperature so the responsible engineer can assess strength, connection behavior and sustained deflection. Resolve the vessel-side reactions before fabrication release; the beam's capacity does not verify its supporting ledge.
ReferencesASTM C581-26: chemical resistance in liquid serviceASTM D543-21: evaluating the resistance of plastics to chemical reagentsKoch-Glitsch: plastic packing and column internalsEN 13121-3:2016: above-ground GRP tanks and vessels
A useful qualification package identifies the resin and reinforcement system, profile revision, relevant test specimens, manufacturing route and acceptance criteria. Keep material evidence, component calculations and routine production inspection as distinct records. Changes to the surface veil, conductive additive, coating or thickness should trigger review of the evidence affected by that change.
Where the plant requires fire or electrostatic properties, specify the exact method and configuration to test. An ordinary glass-fiber profile must not be relabeled as antistatic because the assembly has a grounding lug. The system integrator determines the required charge-control arrangement and legal conformity responsibilities for the intended hazardous-area use.
ReferencesINEOS Composites: Derakane resin selection guideASTM C581-26: chemical resistance in liquid serviceIEC TS 60079-32-1:2013+A1:2017: electrostatic hazardsDirective 2014/34/EU: equipment for explosive atmospheres
Agree on a lot inspection plan before production. Identify which dimensions require a report, which surfaces require visual inspection and how material batches are linked to component labels. Record acceptable appearance and repair criteria so exposed reinforcement, splitting or a damaged connection feature is not accepted by informal comparison with an old part.
For a representative assembly, verify hole alignment, support contact, module clearances, hold-down engagement and unobstructed drains. Identify any gauges or fixtures used and record the drawing revision. The plant performance test remains a separate acceptance activity after installation; dimensional conformity is necessary evidence of fit, not a removal-efficiency certificate.
ReferencesASTM D3917-23: dimensional tolerances of pultruded shapesSulzer: vane geometry, drainage and gas-flow directionVDI 3679 Part 3:2019-08: wet separators and mist eliminatorsUS EPA: air-emissions monitoring for permits
Confirm the packed length, manway opening and lifting route. Use a module and part identification scheme that survives transport and the agreed operating environment. Keep the approved drawing and material revision with the spare inventory; a visually similar section can have a different laminate or critical interface.
Request the OEM's cleaning and inspection procedure and keep attachment checks accessible. The replacement work plan must address vessel entry and isolation of process equipment. After fitting the part, verify seals and drainage, then record the operating baseline under the system commissioning procedure. Investigate recurring deformation, cracking or fouling before repeating the same specification.
ReferencesMunters: DV210+ mist elimination and integrated washingOSHA 29 CFR 1910.146: permit-required confined spacesOSHA 29 CFR 1910.147: control of hazardous energyUS EPA: wet scrubbers for particulate matter
Guidance · Germany; other projects when specified
A technical basis for selecting mist-elimination arrangements and agreeing droplet measurement, washing, operating and maintenance provisions.
Application boundary: An OEM performance agreement must still name the actual duty and measurement method. Referencing this guidance is not certification of a profile or an emissions guarantee.
ReferencesVDI 3679 Part 3:2019-08: wet separators and mist eliminators
Standard · Material qualification when contractually specified
Chemical-exposure test planning: identify the resin, laminate, reagent, temperature, time and properties to evaluate. C581 addresses unstressed reinforced thermoset specimens for liquid service. European vessels designed to EN 13121-3 normally take laminate chemical-resistance evidence from EN 13121-2; confirm which route the vessel designer requires.
Application boundary: Different methods answer different questions. These tests alone do not qualify wet gas, hot dry excursions, sustained structural loading or a finished demister assembly.
ReferencesASTM C581-26: chemical resistance in liquid serviceASTM D543-21: evaluating the resistance of plastics to chemical reagents
Standard · Pultruded component purchasing when specified
Provides a dimensional-tolerance framework for thermosetting glass-reinforced pultruded shapes.
Application boundary: State agreed vane spacing, contact faces, module squareness and mounting-hole tolerances on the project drawing; dimensional conformity does not establish separation performance.
ReferencesASTM D3917-23: dimensional tolerances of pultruded shapes
Standard · European GRP vessel projects and contracts specifying it
Applies within its defined scope to design and workmanship of above-ground GRP tanks and vessels, including specified shell attachments. The vessel designer reviews the load transfer from internals.
Application boundary: Do not label a pultruded beam or vane as an EN 13121-certified scrubber. Check the prescribed laminate, fabrication and verification provisions for the proposed construction; the public scope excludes vessels subject to explosion risk.
ReferencesEN 13121-3:2016: above-ground GRP tanks and vessels
Regulation · Facility jurisdiction; U.S. Title V/CAM where applicable
The operator identifies the applicable emissions limit, monitoring, reporting and replacement-change requirements for the source and its control device.
Application boundary: A material certificate or internal-component inspection does not demonstrate stack-emissions compliance. A site's permit and approved test procedures establish its acceptance obligations.
ReferencesUS EPA: air-emissions monitoring for permitsUS EPA: wet scrubbers for particulate matter
Regulation · European Union; products within the directive's scope
First establish the intended explosive atmosphere, use and legal product status. Identify applicable conformity responsibilities for equipment, protective systems or components.
Application boundary: A raw FRP profile has no automatic ATEX approval. Determine applicability from the actual product and installation rather than assigning a certification label from material properties.
ReferencesDirective 2014/34/EU: equipment for explosive atmospheres
Guidance · Electrostatic risk assessments and projects specifying this guidance
Informs the assessment of charging and discharge hazards and measures involving conductors, insulating surfaces and operating conditions.
Application boundary: Insulating FRP, flame retardancy or an earthed metal bracket alone does not establish explosion safety. Verify the specified charge-control properties in the assembled configuration.
ReferencesIEC TS 60079-32-1:2013+A1:2017: electrostatic hazards
Public source scopes were reviewed on . These references do not establish certification of an F1 product. Agree the offered grade, finished component, test specimen and acceptance criteria in the project specification.
They are candidates only after the profile, chemistry, load, connection and movement requirements are checked. A nominal section match does not establish equal reinforcement, corrosion protection or service-temperature behavior.
A sample helps identify geometry, but pair it with a survey and approved replacement drawing. Worn holes, creep or damaged edges should not become the new manufacturing dimensions. Confirm why the original part failed before finalizing the replacement.
The primary scope is support and locating profiles. A constant-section vane can be reviewed separately against an authorized OEM drawing and qualification plan. Separator geometry, operating envelope and performance responsibility must be agreed explicitly.
Industry application evidence
Röchling: composite profile applications in chemical plantsThe chemical plant section identifies lamella walls in a flue gas washer. It establishes the application, not an F1 resin specification or separation guarantee.
Industry application evidence
Röchling: pultrusion process and reinforcement choicesManufacturing background for continuous profile geometry and the selection of reinforcement and resin; competitor capabilities are not attributed to F1.
Industry application evidence
Sulzer: vane geometry, drainage and gas-flow directionOEM explanation of simple and complex vane separators. Proprietary capacities and geometry are not used as F1 product ratings.
Industry application evidence
Sulzer: gas–liquid separation technologyOEM discussion of mesh, vane and other separation methods, including efficiency, pressure loss, materials and fouling tradeoffs.
Industry application evidence
Sulzer: diagnosing liquid carryover and flow distributionSystem-level diagnostic example involving CFD, maldistribution and bypass; the high-pressure case study does not establish performance in an atmospheric FRP scrubber.
Industry application evidence
Munters: DV210+ mist elimination and integrated washingOEM evidence for salt, dust and gypsum deposition, wash coverage and cleaning-cycle integration. Its system guarantees belong to that supplier.
Industry application evidence
Munters: DV 880 vertical-flow mist eliminatorExplains capture, coalescence and gravity drainage in a vertical-flow vane system; specific operating envelopes remain OEM dependent.
Industry application evidence
Koch-Glitsch: plastic packing and column internalsDistinguishes packing, support plates and bed limiters; vessel ledge adequacy and internals depend on the actual installation.
Standard or public authority
US EPA: wet scrubbers for particulate matterPublic guidance on entrainment separators, operating problems and monitoring indicators. Its discussion of particulate control is not a universal acid-gas performance model.
Standard or public authority
US EPA: air-emissions monitoring for permitsExplains source-level permit and monitoring responsibilities. Title V and Compliance Assurance Monitoring applicability must be established for the facility.
Industry application evidence
INEOS Composites: Derakane resin selection guideResin-specific exposure guidance with concentration, temperature and laminate qualifications. A listed resin temperature is not a finished pultrusion rating.
Standard or public authority
ASTM C581-26: chemical resistance in liquid serviceCurrent public scope checked: unstressed reinforced thermoset specimens provide chemical-resistance evidence, not the sole basis for a loaded component's serviceability.
Standard or public authority
ASTM D543-21: evaluating the resistance of plastics to chemical reagentsExposure conditions, stress and retained properties must match the question being tested. Laboratory results have stated limits.
Standard or public authority
ASTM D3917-23: dimensional tolerances of pultruded shapesASTM lists the active dimensional-tolerance specification. A demister fit drawing must separately identify its critical interface tolerances.
Standard or public authority
VDI 3679 Part 3:2019-08: wet separators and mist eliminatorsPublic scope covers droplet separation, measurement, washing, performance agreements and maintenance. No unpublished numerical criteria are reproduced.
Standard or public authority
EN 13121-3:2016: above-ground GRP tanks and vesselsScope includes specified tanks, vessels and attachments bonded directly to their shells. It is not a freestanding demister-efficiency or generic pultrusion product standard.
Standard or public authority
Directive 2014/34/EU: equipment for explosive atmospheresUse the applicable consolidated text and national implementation. Scope depends on equipment, protective-system or component status and intended use; a raw FRP profile has no automatic ATEX approval.
Standard or public authority
IEC TS 60079-32-1:2013+A1:2017: electrostatic hazardsGuidance for assessing charging and ignition risks, including conductors and insulators. It does not assign every scrubber the same electrical material specification.
Standard or public authority
OSHA 29 CFR 1910.146: permit-required confined spacesFor work within its U.S. general-industry scope, the employer evaluates the vessel and entry hazards and establishes the required controls.
Standard or public authority
OSHA 29 CFR 1910.147: control of hazardous energyRelevant to servicing within the rule's scope; isolation planning must consider fans, pumps, automatic wash cycles and connected process equipment.
Provide the application and acceptance requirements so we can assess material, geometry, sampling and the proposed supply scope. We reply within one business day; a formal quotation follows once the specification and delivery are reviewed.
