PART 8: USE OF SMALL-SCALE PIPELINE SPECIMENS TO TEST A STEEL-ADHESIVE REPAIR SYSTEM

• Published in: Experimental techniques (Westport, Conn.) Vol. 31; no. 6; pp. 64 - 72
• Main Authors: Perez Rosas, M.A., Vieira, R.D., Freire, J.L.F.
• Format: Journal Article Magazine Article
• Language: English
• Published: Malden, USA Blackwell Publishing Inc 01.11.2007; Springer Nature B.V
• Subjects: Case studies; Electric resistance; Epoxy resins; Investigations; Low carbon steel; Repair & maintenance; Scale models; Steel pipes
• ISSN: 0732-8818; 1747-1567
• DOI: 10.1111/j.1747-1567.2007.00270.x

EXPERIMENTAL METHODS Materials' Properties The test specimens were made from two batches of low carbon steel electric resistance welded pipe (named herein pipe batches 1 and 2) with external diameter (Z) equal to 76.2 mm and wall thickness (t) equal to 2 or 2.04 mm. The specimens had a length of 600 mm and were weld capped with plane heads with thicknesses equal to 12.7 mm. The difference between the two batches was caused by their unequal strength properties, as shown in Table 1. The nominal defect patch dimensions corresponded to 70% depth (d = 1.4 mm of t = 2 mm) along the thickness, widths (w) equal to 14 mm, and lengths (L) equal to 75 mm. The ratios between length L and product [the square root of]Dt were equal to 6.1, which made the defects to be considered as long-length defects, that is, L^sup 2^ > 20 Dt.3,4 The two batches of pipe and steel laminas were tested to determine their elongation after fracture (δ) and their uniaxial yield (S^sub y^) and ultimate SJ strengths.