Real experience. Real expertise.

With decades of experience in portable container engineering, we provide industry-leading expertise in the design, fabrication, modification, and certification of ISO tank containers and specialized portable tanks. Our team combines deep technical knowledge with practical field experience to deliver safe, compliant, and efficient solutions for the transportation and storage of hazardous and non-hazardous products. Whether you are seeking guidance on a new tank project, fleet modifications, code compliance, or operational best practices, our expertise helps ensure reliable performance and long-term asset value.

1,000+

Tanks customized

20+

yrs of project history

40+

Countries served

Interactive

Explore a tank inside and out.

Spin, zoom, and explore an ISO tank container in 3D — every valve, baffle, and fitting modeled from real equipment.

Reference

Portable tank T-Codes, decoded.

Every hazardous material in the §172.101 table maps to a T-Code that sets the tank’s minimum test pressure, shell thickness, pressure relief, and bottom-opening rules. Find your code below — or ask us what it means for your equipment.

Portable tank instruction	Minimum test pressure (bar)	Minimum shell thickness (mm, reference steel)	Pressure-relief requirements	Bottom opening requirements
T1	1.5	§178.274(d)(2)	Normal	§178.275(d)(2)
T2	1.5	§178.274(d)(2)	Normal	§178.275(d)(3)
T3	2.65	§178.274(d)(2)	Normal	§178.275(d)(2)
T4	2.65	§178.274(d)(2)	Normal	§178.275(d)(3)
T5	2.65	§178.274(d)(2)	§178.275(g)(3)	Prohibited
T6	4	§178.274(d)(2)	Normal	§178.275(d)(2)
T7	4	§178.274(d)(2)	Normal	§178.275(d)(3)
T8	4	§178.274(d)(2)	Normal	Prohibited
T9	4	6 mm	Normal	Prohibited for liquids
T10	4	6 mm	§178.275(g)(3)	Prohibited
T11	6	§178.274(d)(2)	Normal	§178.275(d)(3)
T12	6	§178.274(d)(2)	§178.275(g)(3)	§178.275(d)(3)
T13	6	6 mm	Normal	Prohibited
T14	6	6 mm	§178.275(g)(3)	Prohibited
T15	10	§178.274(d)(2)	Normal	§178.275(d)(3)
T16	10	§178.274(d)(2)	§178.275(g)(3)	§178.275(d)(3)
T17	10	6 mm	Normal	§178.275(d)(3)
T18	10	6 mm	§178.275(g)(3)	§178.275(d)(3)
T19	10	6 mm	§178.275(g)(3)	Prohibited
T20	10	8 mm	§178.275(g)(3)	Prohibited
T21	10	10 mm	Normal	Prohibited for liquids. §178.275(d)(2)
T22	10	10 mm	§178.275(g)(3)	Prohibited

T50 — liquefied compressed gases and chemicals under pressure identified with portable tank instruction T50 in the §172.101 Hazardous Materials Table are transported per §173.313.

T75 — refrigerated liquefied gases referencing portable tank instruction T75 in the §172.101 Table are transported per §178.277.

Source: 49 CFR — Table of Portable Tank T Codes T1–T22 (eCFR). Codes T1–T22 apply to liquid and solid hazardous materials of Classes 3–9 transported in portable tanks. Always verify against the current eCFR text.

Parts & Accessories

Tank container parts and tools. Visit our online store.

Case Studies & Project Gallery

Before-and-after photos and write-ups from refurbishment, repair, and customization projects.

Request a quote

Tell us about your tank.

Send a few details and we’ll come back within one business day with a scope, timeline and price. For urgent repairs and refurbishment, call us directly — we keep parts on hand.

+1 281-542-6800

Mon–Fri, 7am–6pm CT

sales@customtank.com

Typical response within 1 business day

14510 Beaumont Highway

Houston, TX 77049 USA

Start your project

All fields except message are required. We respond within one business day.

Your name

Company

Phone

What do you need?

Product or chemical being transported

Message

By submitting, you agree to be contacted by Custom Tank about your project. We don’t share your details.