The pharma-grade ISO tank is a niche dedicated build for pharma intermediates, USP and EP-grade chemicals, and selected active pharmaceutical ingredients shipped in bulk. The build distinction from a food-grade T11 is the polish quality (mirror-polished to Ra under 0.4 micrometres rather than Ra under 0.8), the cleaning regime (CIP plus optional SIP, steam-in-place sterilisation), the fitting standard (ASME BPE-2022 Bioprocessing Equipment), and the documentation regime (FDA 21 CFR 177 / 178 / 210 / 211, cGMP-aligned cleaning protocols, full traceability with CoA, weld map, material certificates).
What pharma-grade is built for
The cargo population is small and high-value. Glycerine USP (United States Pharmacopeia) shipped in dedicated tanks for pharma manufacturing and personal-care formulation. Propylene glycol USP for pharma vehicle and excipient applications. IPA pharma-grade (UN 1219, Class 3 PG II on the IMDG plate but treated as a pharma cargo end-to-end) for pharmaceutical synthesis. Monoethylene glycol pharma-grade and polyols for pharma intermediate manufacturing. A small population of API ships in bulk under specific contractual quality regimes; the volumes are usually below the 20-tonne ISO-tank threshold but specific pharma chemistries do justify ISO-tank shipping.
Construction and materials
316L stainless cylinder with full pickling and electropolishing to Ra under 0.4 micrometres on the cargo-contact surface. No internal heating coils (heating coils introduce dead legs that complicate CIP cleaning); heating, where required, runs through external steam-jacketed sections or via a glycol jacket. Insulation 75 to 100 mm polyurethane foam under aluminium or GRP cladding. ASME BPE-compliant fittings throughout: hygienic clamp connections, sanitary tube finish, drainable design, no crevices.
CIP system fitted as standard. Optional SIP (steam-in-place) for builds carrying APIs or sterile-process intermediates. Pre-loading swab tests are part of the booking protocol: TOC (total organic carbon) measurement on a pre-load rinse sample, conductivity check for residual cleaning agent, riboflavin coverage test for hard-to-clean shadow zones. Nitrogen-blanket capability standard for cargoes that oxidise.
When pharma-grade is the right choice
Pharma-grade is the right tank for any USP or EP-grade pharma intermediate above the 15 to 20-tonne ISO-tank threshold where the buyer requires the cGMP-aligned cleaning regime and the full traceability documentation stack. The pharma fleet is much smaller than the food-grade fleet (low thousands of tanks worldwide vs tens of thousands of food-grade); spot-market availability is limited and most bookings work through pre-positioned operator inventory.
When pharma-grade is the wrong choice
Pharma-grade is the wrong tank for industrial-grade chemicals where USP or EP grade is not required: a chemical T11 or food-grade T11 is far cheaper and the cleaning regime is sufficient. It is also the wrong tank when the cargo volume per shipment falls below the ISO-tank threshold; smaller pharma cargoes ship in IBCs (under 1 MT) or steel pharma drums.
How a pharma-grade booking is verified
Pre-loading inspection covers the standard plate stack (CSC, 5-year, 2.5-year) plus the cGMP documentation chain: ASME BPE compliance certificate, electropolish certificate (Ra measurement record), CIP system functional test, optional SIP cycle log, TOC pre-load swab result, dedicated-fleet history showing no industrial-grade chemical cargo in any prior load. Operator selection is highly constrained: Stolt’s pharma division, Bertschi pharma, and Hoyer pharma-chemicals are the major players, with a small group of regional specialists in Switzerland, Germany, and the US northeast pharma corridor.