Custom 304 & 316L Stainless Steel Tank Fabrication to Your Drawings
Custom 304 and 316L stainless steel tanks, jacketed and insulated process vessels, agitated reactor tanks, instrument-ported batch tanks, and code-stamped stainless pressure vessels — engineered to your drawing, finish spec, and service requirements.
When a stock polyethylene tank cannot cover the chemistry, when off-the-shelf stainless steel does not match the application, and when the specification calls for purpose-built construction — custom stainless fabrication is the answer. 304 stainless is the baseline for most general service: food and beverage batch tanks, process water storage, mild chemical service, compressed-air receivers. 316L stainless adds 2–3% molybdenum for pit-corrosion resistance, essential for chloride-bearing streams (brines, seawater, sanitizer circuits), aggressive sanitizer programs, pharmaceutical processing, and any welded-intensive fabrication where the low-carbon grade prevents carbide precipitation at weld zones.
Beyond material selection, every custom stainless vessel requires a dozen spec decisions: jacket type (steam, glycol, electric, water); jacket coverage (partial, full, dimple-pattern for weight-reduced half-jacket); agitation (top-entry, side-entry, bottom-entry, turbine, propeller, anchor, scrape-surface); interior finish (mill finish, #2B, #4, 32 Ra mirror, electropolish); exterior finish (mill, #2B, #4, painted); insulation (foam-in-place, mineral-wool, aerogel); instrumentation ports (pressure, temperature, level, pH, conductivity, dissolved oxygen); access (manway, handhole, sight-glass, sample valve); support structure (legs, skirt, lugs, saddles, skid-frame); and documentation package (MTRs, weld maps, hydro-test record, cleanliness certification, ASME U-stamp if applicable).
A disciplined fabrication shop builds to AWS D18.1 (sanitary welding) and ASME BPE (Bio-Processing Equipment) on product-contact welds; ASME Section IX qualified weld procedures across the shop; ASTM A967 passivation specifications applied post-fabrication; and finishes verified with surface-roughness profilometry before shipment. Code work (ASME Section VIII for pressure vessels) runs under the shop's U-stamp with Authorized Inspector witnessing at hold points. Every vessel ships with its full documentation package bound and traceable.
What We Fabricate
304 Stainless Tanks
General-service food, beverage, and industrial batch tanks with #4 or 32 Ra finish.
316L Stainless Tanks
Chloride-resistant and welded-intensive fabrication for aggressive-service, sanitizer, and pharmaceutical applications.
Steam-Jacketed Process Tanks
Steam dimple or partial jacket for heated-batch process work.
Glycol-Jacketed Tanks
Chilled-glycol cooling jacket for fermentation, refrigerated batch hold, and temperature-sensitive process.
Electric-Jacketed Tanks
Resistance-heated jackets for low-volume heated-batch service without steam infrastructure.
Agitated Batch Tanks
Top, side, or bottom-entry agitator with turbine, propeller, anchor, or scrape-surface impeller.
Insulated Tanks
Foam-in-place, mineral-wool, or aerogel insulation with stainless-steel weather jacket.
Instrument-Ported Vessels
Level, temperature, pH, conductivity, and dissolved-oxygen sensor integration.
Skid-Mounted Process Skids
Integrated portable process skids with tanks, pumps, controls, and piping.
Stand-Mounted Tanks
Structural-stand-integrated vessels for clean installation and mezzanine integration.
ASME Pressure Vessels
Code-stamped U-1 Section VIII stainless pressure vessels for regulated service.
Sanitary (3-A) Finish Vessels
32 Ra mirror or electropolish product-contact finish for food, beverage, pharma.
How a Custom Project Works
Requirements capture. Volume, materials of construction, service chemistry, operating temperature and pressure, installation footprint, utility connections, code and finish requirements. We work from a specification sheet you provide or we draft one against your process flow.
Engineering and drawings. Our partner engineering team produces a general-arrangement drawing, bill of materials, weld-map, and code calculation package if applicable. You review and sign off before any steel is cut.
Material procurement. Plate, pipe, fittings, and elastomers are ordered against the approved BOM. Material Test Reports (MTRs) are captured for every heat of stainless or carbon steel used on code work.
Fabrication. Shell courses rolled and seam-welded, heads formed and welded, ports installed per drawing. Sanitary work is TIG-welded with argon purge and ground flush to 32 Ra or better on product-contact surfaces.
Inspection and testing. Radiographic or ultrasonic weld inspection where code requires, hydrostatic pressure test at 1.3x design pressure for code vessels, surface-roughness profilometry on sanitary vessels, passivation to ASTM A967.
Documentation and shipment. MTRs, weld maps, NDE reports, hydro certificates, code stamps, and ASME Form U-1 (if applicable) are bound into a documentation package that travels with the vessel. Shipment via flatbed or step-deck with blocking, bracing, and tarp as specified.
Custom Stainless Fabrication — Project Gallery
Cleveland Custom Carbon Steel TanksCustom Tanks Built To Your Specifications With Unmatched ExperienceDesigning Customizing Stainless Steel Tanks A GuideDownload The Ultimate Guide To Custom Stainless Steel TanksProcessing Equipment When Where You Need ItStainless Steel LiquefiersTop 5 Mistakes When Designing A Custom TankTop Questions To Ask Potential Stainless Steel Tank Suppliers3 Common Heating Jackets For Insulated Pressure Tanks3 High Shear Rotor Stator Profiles3m Filtration Products5 Types Of Mixing Impellers Designs Flow Patterns And Uses7 Ways To Improve Mixing Efficiency Across Your ProcessA Guide To High Speed Disperser Design Engineering Mixing PerfectionAbout UsAdhesives Sealant ProcessesAsk A Process EngineerAutomated Turn Key Equipment Designed To Serve InnovatorsAutomationAutomation In Beverage ProcessingAuxiliary EquipmentAxial Vs Radial Flow Impellers What S The DifferenceBarrel Fill And Draw System
Frequently Asked Questions
304 or 316L?
Default to 304 unless: service is chloride-bearing (saltwater, brine, some sanitizers), the fabrication is heavily welded (> 10–15% of surface is weld or HAZ), service is pharmaceutical or aggressive sanitizer program, or customer quality spec mandates 316L.
What's the lead time on a custom stainless tank?
Small standard-design vessels (< 500 gal, simple geometry, mill finish): 8–14 weeks. Mid-size jacketed/agitated tanks (500–5,000 gal, 32 Ra finish, custom ports): 14–22 weeks. Large custom vessels, code-stamped or heavily instrumented: 20–36 weeks.
Can you match an existing tank drawing?
Yes — as long as we have a full drawing package (dimensions, ports, materials, finishes). We can also reverse-engineer from an existing vessel with a site measurement visit.
What finish do I need for food contact?
3-A Sanitary Standards require 32 Ra (microinches) or smoother on product-contact surfaces. #4 mechanical polish is typically supplemented with blend-sanding or electropolish to hit 32 Ra. Pharmaceutical (ASME BPE) requires 15–20 Ra on some applications — typically achieved with electropolish.
Give us your process specs — volume, service chemistry, installation footprint, utility connections, finish requirements. We come back with a full engineering package, firm lead time, and fixed price. No obligation, no sales pressure.
