281.491.2331 13839 West Bellfort Street Sugar Land, TX
281.491.2331 13839 West Bellfort Street Sugar Land, TX
ISO 9001:2015
U.S. Patents
90 + U.S. Patents
Since 1954
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TCC Optimum™

TCC Optimum

Light on Weight, Heavy on Features

No on-site lab? Meet the Welker TCC Optimum™: the only crude oil container on the market with DOT and Transport Canada approval. With the compact TCC Optimum™ as your primary container, safely getting your composite sample of stabilized crude to an off-site lab for mixing and analysis is possible. Special design features exceed industry standards and improve the operator experience.

Complies WithAPI Chapter 8, ASTM D4057, ASTM D4177, ASTM D5854, ISO 3170, ISO 3171
ASME code stampedU code; ASME Boiler and Pressure Vessel Code (BPVC) Section VIII
Transport Approval*DOT and Transport Canada (DOT-SP 16074; TC-SU 11319)
A Shining Example

ProSlick™ Finish

Our proprietary ProSlick™ finish does more than dazzle the eyes. The smooth, mirrored finish optimizes sample quality and improves the operator experience. Unable to stick to the finished interior, water can’t avoid being mixed into the sample, so you can be confident in the accuracy of your water cut measurements. The repellent effect of the ProSlick™ finish makes cleaning the container inside and out a breeze—preparing for the next sample batch just got easier.

TCC Optimum Features
With You in Mind

User-Friendly Features

No need to strain. The TCC Optimum™ has a dry weight of 15 lb, carry handle, and ring chime base to make light work of container transport.

Whether you’re on site at the sampling location or off site in the lab, the quick-connects make TCC Optimum™ installation and removal quick and easy.

Checking All the Boxes

Standards-Driven Design

Standards are developed for a reason, and they’re the reason behind our design. Representative samples matter to you, so they matter to us. The key features of our TCC Optimum™ meet the requirements of API, ASTM, and ISO to help you maintain representativeness from collection to analysis.

Rounded Bottom

  • No pockets or dead spots to bias the sample
  • Facilitates mixing and complete sample withdrawal

Bottom Suction Port & Top Return Port

Internal Spray Bar

  • Evenly disperses components during mixing for representative subsamples
  • Evenly disperses solvent for thorough cleaning

Easy-Open Lid

  • Facilitates filling, inspection, and cleaning
  • Protects samples from contamination and maintains sample integrity

Pressure Relief Valve

  • Protects the container from overpressurization

Vacuum Breaker

  • Prevents cavitation during mixing
  • Prevents a vacuum from forming during sample withdrawal

Pressure Gauge

  • On-site pressure indication

Fill Volume Monitoring

  • Internal fill marks for on-site monitoring
  • Use with a weigh scale for remote monitoring


TCC Optimum Transportable Crude Oil Container
 TCC Optimum
Materials of Construction316/316L Stainless Steel Container With Stainless Steel Fittings
Volume2.5 US Gallons
5 US Gallons
Weight2.5-Gallon: 15 lb
5-Gallon: 22 lb
Operating Pressure136 psig @ -20 °F to 100 °F
Industry StandardsDOT Approval*
Transport Canada Approval*
* only on 2.5-gallon models