The Dirty Filter
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Reporting the business of filtration

Section

Engineering Reference

Practical charts, technical documents, and selection references for filtration engineers, maintenance teams, and buyers. Check source conditions before applying the data.

Editorial · Engineering Reference

From Drawing to Nameplate, Part 4: Examination, Inspection, Testing and Certification

Part 4 of From Drawing to Nameplate explains how examination, inspection, pressure testing, nameplate marking and certification fit together in ASME Section VIII, Division 1 original construction for filter housings.

Monochrome editorial illustration of a closed filter housing beside inspection tools, a documentation folder and a blank nameplate, representing buyer review of construction records.
AI-generated editorial illustration for The Dirty Filter; not a technical drawing, certification mark or field-test instruction.

Editorial · Engineering Reference

From Drawing to Nameplate, Part 3: Fabrication and Welding Requirements

Part 3 of the ASME housing series explains how approved drawings become controlled fabrication work: material traceability, fit-up, welding qualification evidence, inspection coordination, documented repairs and final supplier records.

Monochrome editorial illustration of an isolated filter housing shell on a fabrication bench with weld preparation, drawings, inspection tools and records.
AI-generated editorial illustration of fabrication and welding coordination for a pressure-vessel filter housing; not a technical drawing or certification record.

Editorial · Engineering Reference

From Drawing to Nameplate, Part 2: Materials Requirements

Part 2 of the ASME filter-housing series explains how material specifications, design conditions, wetted seals, MTRs, heat traceability and substitutions should be handled before a vessel reaches the nameplate.

Monochrome editorial illustration of pressure-vessel plate, pipe, flanges, bolting, gaskets and material paperwork arranged to show heat-number traceability before fabrication.
AI-generated editorial illustration, not a technical drawing: material records and traceability paperwork beside unmarked pressure-vessel components.

Editorial · Engineering Reference

From Drawing to Nameplate, Part 1: Engineering and Design

Part 1 explains why an ASME Section VIII, Division 1 filter housing starts with service conditions, design basis, geometry, materials and documentation—not a pressure rating alone.

Monochrome editorial illustration of a closed liquid-filter pressure housing beside engineering drawings and calculation sheets for design review.
AI-generated editorial illustration: a closed liquid-filter pressure housing and engineering documents before fabrication. Not a technical drawing, actual installation, ASME stamp or certification endorsement.

Editorial · Engineering Reference

ANSI / ASME Flange Chart: Class 150 Dimensions

Class 150 flange dimensions for common pipe sizes, with a drilling-pattern diagram and links to Texas Flange charts.

NPS 4 Class 150 drilling pattern: 9 inch outside diameter, 7.5 inch bolt circle, eight 0.75 inch holes.
Original drilling-pattern diagram using Texas Flange reference dimensions; bore and facing omitted.

Editorial · Engineering Reference

Pressure Drop and Filter Area

Know which flow curves, fluid properties, and differential-pressure limits to request for filter selection.

Conceptual cutaway of a bag filter housing with upstream and downstream pressure gauges.
AI-generated conceptual illustration; not to scale.

Editorial · Engineering Reference

Bag Filter Housing Documents: What to Compare

Compare housing documentation with a practical checklist of ratings, materials, dimensions, and service requirements.

Bag filter housing beside engineering drawings, a checklist, and measuring tools.
AI-generated conceptual illustration; not to scale.

Editorial · Engineering Reference

Micron Ratings: Ask for the Efficiency

A beta-ratio reference table explains why particle size alone does not describe filter performance.

Conceptual illustration of differently sized particles passing through fibrous filter media.
AI-generated conceptual illustration; not to scale.

Editorial · Engineering Reference

O-Ring Selection: Material and Dimensions

Use Parker’s material and sizing tools alongside your housing manufacturer’s seal specification.

Exploded O-ring and groove illustration beside a caliper.
AI-generated conceptual illustration; not to scale.

Editorial · Engineering Reference

Chemical Compatibility: Start with the Seal

Find seal compatibility references and the service conditions needed before selecting a compound.

Conceptual ink illustration of an elastomer seal between machined flange faces.
AI-generated conceptual illustration; not to scale.