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304 & 316L Metal Pall Ring Price & Specs: 16–76mm for Distillation, Absorption & Scrubbing

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304 & 316L Metal Pall Ring Price & Specs: 16–76mm for Distillation, Absorption & Scrubbing

304 & 316L Metal Pall Ring Price & Specs: 16–76mm for Distillation, Absorption & Scrubbing
September 18, 2026

 

304 and 316L stainless steel metal Pall rings in 25mm and 50mm sizes for distillation and scrubbing towers

Figure 1: 304 (bright) and 316L (matte) stainless steel Pall rings — the two most specified grades for corrosive tower service.

304 & 316L Metal Pall Ring Price & Specs: 16–76mm for Distillation, Absorption & Scrubbing

Buyer's Brief: Metal Pall rings deliver the best balance of mass transfer efficiency, mechanical strength, and cost among all random packings. 304 grades suit general non-chloride service; 316L is the default for chloride-containing, acidic, or pharmaceutical applications. Below: full specifications, material selection logic, and pricing factors per cubic meter — so you can budget accurately before requesting a formal quote.

1. What Are 304/316L Metal Pall Rings?

Metal Pall rings are the workhorse of random tower packing — evolved from the Raschig ring by punching two rows of windows in the cylindrical wall and bending the resulting tabs inward . This creates internal wetting surfaces and open gas pathways, eliminating the severe channeling and high pressure drop of plain cylinders.

Stamped from stainless steel strip (304 or 316L), they combine high mechanical strength (supporting deep beds up to 6 m without intermediate supports), temperature resistance to 450°C, and corrosion immunity in a wide range of aqueous and organic services . For a deeper technical dive, see our Stainless Steel Metal Pall Ring specification page.

Close-up of 316L stainless steel Pall ring showing punched windows and inward-bent fingers that create internal wetting surfaces

Figure 2: Punched windows and inward-bent fingers — the geometric features that give Pall rings 30–50% better mass transfer than Raschig rings.

2. Technical Specifications & Dimensions

All dimensions in mm. Data applies to both 304 and 316L grades (wall thickness may vary slightly by manufacturer):

Size D×H×T (mm) Surface Area (m²/m³) Void Fraction (%) Bulk Number (pcs/m³) Bulk Density (kg/m³) Typical ΔP (Pa/m)
16 × 16 × 0.3 330–360 96.0–96.5 214,000 360–380 400–550
25 × 25 × 0.5 210–220 94.5–95.5 51,900 310–340 250–400
38 × 38 × 0.6 140–146 95.0–96.0 13,800 280–310 180–300
50 × 50 × 0.8 105–109 94.5–95.5 6,500 240–270 120–200
76 × 76 × 1.0 70–74 95.0–96.0 1,830 220–250 80–150

Data compiled from industry standard stainless steel Pall ring datasheets. Bulk density shown for 304 grade; 316L is ~2% heavier. Custom sizes (10/13/89/100mm) and wall thicknesses on request.

3. 304 vs 316L: Material Selection & Price Premium

Choosing between 304 and 316L is the single biggest price driver. The difference isn't just material cost — it's service life, downtime risk, and corrosion failure prevention. See our 304 vs 316L Structured Packing guide for full corrosion threshold data.

Factor 304 Stainless Steel 316L Stainless Steel
Cr / Ni / Mo 18% Cr / 8% Ni / 0% Mo 16% Cr / 10% Ni / 2–3% Mo
PREN (Pitting Index) 18–20 24–26
Chloride Resistance ≤ 50 ppm (cold, neutral) ≤ 200 ppm (cold), ≤ 100 ppm (hot)
Max Temperature 450°C (continuous) 450°C (continuous)
Relative Price (per m³) Baseline ($1,200–1,800) +15–25% premium ($2,500–4,000)
Best For Fresh water, organics, non-chloride acids, solvents Seawater, chlorinated solvents, HCl/Cl2 scrubbing, pharma
Side-by-side comparison of 304 stainless steel (bright silver) and 316L (matte finish) metal Pall rings

Figure 3: 304 (bright, left) vs 316L (matte, right) — visual difference is subtle; corrosion performance is not.

4. Pricing Factors (What Drives Your Quote)

  • Size & Wall Thickness: Smaller diameters (16/25mm) have higher fabrication cost per m³ due to more pieces and thinner strip handling. Thicker walls add material cost but improve crush resistance.
  • Material Grade: 316L typically carries a 15–25% premium over 304 due to molybdenum content and lower production yield . Special alloys (Duplex 2205, Hastelloy C-276, Titanium) add 100–300%.
  • Order Volume: Spot orders (< 5 m³) carry highest unit price. Contracts ≥ 50 m³ typically receive 15–25% volume discount .
  • Surface Finish & Certification: Electropolishing, passivation (ASTM A967), and MTC to EN 10204 3.1 add 5–10%. NACE MR0175 compliance for sour service adds 10–15%.
  • Packaging: Standard woven bags (25kg/bag) included. Steel drums, wooden pallets, or anti-static packaging for solvent service add $20–50/m³.
  • Raw Material Index: Stainless steel strip prices fluctuate with LME nickel and chrome indices. Quotes are typically valid 15–30 days.

5. Primary Applications

  • • Distillation: Hydrocarbon fractionation, solvent recovery, ethanol/water separation — 304 for non-corrosive feeds, 316L for acidic cuts .
  • • Gas Scrubbing: CO2 and H2S removal with amine solutions (316L recommended due to trace chlorides in makeup water) .
  • • Acid Gas Absorption: SO2, SO3, HCl, Cl2 scrubbing — 316L minimum; upgrade to Ti or PVDF for extreme chlorides .
  • • Vacuum Distillation: Low pressure drop (0.3–0.8 kPa per stage) makes metal Pall rings suitable for heat-sensitive separations at 50–200 mbar .
  • • Cross-Reference: For corrosive aqueous service below 100°C, compare with Plastic Pall Ring Packing (PP/CPVC/PVDF) — often 60–70% lower cost where temperature permits.
304 stainless steel Pall rings loaded into a distillation column with camel hump support grid at bottom

Figure 4: 38mm 304 Pall rings loaded into a 1.2m ID distillation column on a camel hump support grid.

6. Installation & Tower Internals

  • Support Grid: Use a camel hump support grid with opening ≤ 60% of ring diameter. Metal Pall rings are heavier than plastic (240–380 kg/m³) — verify grid load rating.
  • Uniform Loading: Distribute evenly across tower cross-section. Maximum single-pour bed height: 4–6 m before intermediate collector & redistributor required.
  • Bed Limiter: Install a hold-down plate for beds subject to high gas velocity (> 2.5 F-factor) or vacuum operation.
  • Pre-Wetting: Always flood the bed before introducing vapor to prevent dry channeling. For 316L in chloride service, pre-passivate with nitric acid (20%, 60°C, 30 min) if specified.

7. Quick FAQ

Q: How much does 316L cost more than 304 for the same size?

A: Typically 15–25% premium, driven by molybdenum content (2–3%) and lower mill yield. For a 10 m³ order of 50mm rings, the difference is roughly $3,000–5,000 — often less than a single day of unplanned downtime from chloride stress cracking.

Q: Can I mix 304 and 316L in the same tower?

A: Not recommended. Galvanic coupling between grades in conductive aqueous service accelerates corrosion of the 304 sections. Use one grade throughout, or separate with a non-conductive barrier (e.g., ceramic ring layer).

Q: What's your MOQ and typical lead time?

A: MOQ is 1 m³ (mixed sizes accepted). Standard sizes (25/38/50mm in 304/316L) ship in 7–10 days. Custom sizes, special alloys, or passivation add 15–25 days. Contact us with your tower ID, bed height, and service conditions for a firm quote.

Request a Formal Quote for Metal Pall Rings

Send us your tower diameter, bed height, operating temperature, and process fluid composition (especially chloride concentration). We'll recommend 304 vs 316L, calculate exact m³ quantity, and issue a firm quote within 24 hours. FXSINO supplies stainless steel Pall rings in all standard sizes with MTC, dimensional reports, and matched support grids, liquid distributors, and bed limiters for complete tower packages.

Contact FXSINO: jackieqiu9202@gmail.com | +86 18507999558

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