Compact® - Super Size Ring! Compact® Rings combined to inspect a 60" Pipe December 13th, 2018 After last year's successful launch of the advanced long‑range guided wave inflatable ring system, the low‑profile lightweight Compact® has just received a new upgrade to include larger sizes: Standard range covers pipe sizes between 6" and 36". Larger pipe sizes - up to 74" - can be tested by joining two Compact® rings. Together with the EC‑TRIO modules, the Compact® system is our most versatile yet, and stands ready for the challenging applications on site. For more information, please email: support@guided‑ultrasonics.com, or message us via our Contact Form.