Crawler for Long Seam Weld TSH-01 PA+TOFD Long Seam Weld Category: Ultrasonic Crawler Send an enquiry × Crawler for Long Seam Weld TSH-01 Enter your name : E-mail: VAT Number: Company name: Enter your Message : Description Suitable for butt weld and girth weld, especially suitable for long seam weld, with OD≥Φ150mm. Angles of probe holders/ wheels/ truss are all adjustable to fix different pipes.