For over 20 years, Nordstone has been a premier choice among filtration & separation vessels manufacturers in Italy, delivering engineered excellence to demanding sectors like Oil & Gas, chemical processing, and marine engineering.
Our high-performance bag filter vessel systems are precision-fabricated to manage high-flow industrial liquids, capturing solid particulate contamination down to sub-micron levels while maintaining exceptionally low pressure drops. Designed to thrive under high pressures, extreme process temperatures, and highly corrosive chemical environments, each housing incorporates heavy-duty perforated support baskets that prevent bag rupture or displacement.
By fabricating according to ASME Section VIII, API, and the European Pressure Equipment Directive (PED) standard required across Italy, we ensure absolute safety compliance. Whether you require a single-bag compact unit for specialized batch filtration or a high-capacity multi-bag configuration for automated refinery skids, our Italian and European engineering teams customize every asset.
From sourcing certified exotic materials like SS316L, Duplex, or Hastelloy to conducting advanced non-destructive testing (NDT), Nordstone provides reliable equipment built for operational uptime. For tailored configurations or to review structural drawings matching your local compliance parameters, reach out directly to our engineering office through our Contact Us page.
Frequently Asked Questions (FAQ)
1. What makes Nordstone a leading choice among filtration & separation vessels manufacturers in Italy?
With 20 years of experience, Nordstone combines robust ASME engineering with full European Pressure Equipment Directive (PED) compliance. Our bag filter vessels are trusted across Italy’s oil, gas, chemical, and manufacturing infrastructure due to our precise welding qualifications, material traceability, and capability to engineer custom-skidded systems.
2. What design codes do your industrial bag filter vessels follow for the Italian market?
Every vessel destined for operations in Italy is engineered to meet ASME Section VIII Div. 1 or Div. 2 design calculations, alongside mandatory PED (2014/68/EU) certifications and CE marking. This dual compliance ensures your facility meets both international engineering standards and strict European safety frameworks.
3. Which construction materials do you use for highly corrosive chemical applications?
We process a comprehensive matrix of industrial metals in our advanced manufacturing plants. Depending on your process fluid chemistry, we fabricate housings using:
- Stainless Steel: SS304, SS316, and low-carbon SS316L. nordstoneng.com
- Duplex Alloys: Duplex and Super Duplex for severe chloride or marine risks. nordstoneng.com
- Exotic Alloys: Hastelloy, Monel, Inconel, and Titanium for highly acidic or sour environments.
4. What is the fundamental difference between single-bag and multi-bag filter vessels?
- Single-Bag Vessels: Ideal for batch processes, pilot operations, or small-to-medium flow lines where fluid throughput allows for brief shutdown windows during maintenance.
- Multi-Bag Vessels: Designed for high-volume continuous flow systems. They contain multiple internal elements arranged to handle large dirt-holding loads without constricting velocity, preventing premature pressure spikes.
5. Can Nordstone vessels handle high-pressure and extreme-temperature process profiles?
Yes. Our custom-engineered process units are designed from the ground up to withstand specific stress profiles. We routinely manufacture systems rated from full vacuum up to over 100 bar, with temperature tolerances stretching from cryogenic ranges up to +400°C.
6. Do you offer quick-opening closures for fast bag changeouts?
To optimize maintenance schedules and minimize operator exposure to process fluids, we provide multiple closure configurations. You can specify robust swing-bolt closures for absolute heavy-duty security, quick-clamp mechanisms for rapid access, or hydraulic rocker-arm counterweights for larger multi-bag housing covers.
7. How does the internal support basket prevent bypass or bag damage?
Our vessels feature custom-fit, precision-perforated stainless steel support baskets. The basket acts as a structural shield, absorbing the hydraulic kinetic energy of the liquid stream so that the flexible media bag can collect solids without tearing, shifting, or creating bypass leaks along the sealing ring.
8. What industries in Italy use Nordstone filtration and separation equipment?
Our major deployments span:
- Upstream & Downstream Energy: Hydrocarbon processing and amine loop cleaning.
- Chemical & Petrochemical Processing: Catalyst recovery, raw solvent filtration, and acid removal.
- Water Treatment & Utilities: Raw water pretreatment, cooling towers, and membrane pre-filtration.
- Marine & Offshore: Coastal processing platforms and ballast water handling.
9. What testing protocols do you conduct to ensure zero-defect reliability?
Every unit undergoes an exhaustive non-destructive evaluation (NDE) program before shipment. This includes hydro-testing at 1.3 to 1.5 times the design pressure, pneumatic testing, radiography (RT) of pressure-retaining welds, ultrasonic testing (UT), and dye penetrant testing (DPT) to ensure total structural integrity.
10. Can your bag filter vessels be supplied as ready-to-integrate skid packages?
Absolutely. Nordstone specializes in modular engineering. We can supply the filter vessels fully mounted on a structural steel skid complete with interconnected piping, isolation valves, differential pressure transmitters, and automated bypass instrumentation for plug-and-play installation.
11. How do you prevent internal corrosion from sour or saline process fluids?
Beyond selecting corrosion-resistant metals, we offer specialized internal surface treatments. Options include thick-film glass flake linings, high-performance phenolic coatings, epoxy linings, or weld-overlay clad layers (corrosion-resistant alloy overlaid on carbon steel base metal).
12. What parameter determines when the filter bag needs replacement?
The operational indicator is differential pressure (ΔP)—the pressure difference between the vessel inlet and outlet. A clean system operates at a minimal differential, but as solids accumulate, the ΔP increases. Housings should be serviced before reaching the max delta limit, typically around 1.5 to 2.0 bar, to avoid medium collapse.
13. Do you accommodate custom nozzle positions and flange ratings?
Yes, flexibility is a cornerstone of our 20-year engineering approach. We match your piping layout by configuring side-inlet, bottom-outlet, or top-entry options with flange profiles rated to EN 1092-1, ASME B16.5, or proprietary high-pressure hubs.
14. What documentation package accompanies a Nordstone pressure vessel?
Every shipped equipment piece includes a comprehensive manufacturer’s data book containing ASME/PED calculations, certified mill test reports (MTCs) providing complete material traceability, approved welding procedures (WPS/PQR), NDT reports, and final hydro-test data certificates.
15. How can I request a technical proposal or physical dimensions blueprint?
You can initiate a custom design review by specifying your design pressures, liquid flow rates, operating viscosities, and specific chemical profiles. Contact our application engineering team directly by visiting our Contact Us page to receive a detailed quotation and initial GA drawings.