NDLI: Sour Resistant High Strength Seamless Pipes for Risers

Content Provider	The American Society of Mechanical Engineers (ASME) Digital Collection
Author	Ortolani, Matteo Anelli, Ettore Novelli, Paolo Bagliani, Emanuele Paravicini
Copyright Year	2013
Abstract	In case of a Weld On Connector’s riser using ASTM A182 F22 forged joints, high strength (SMYS of 80 ksi) steel pipes for sour service (hardness below or equal to 250 HV10) suitable for welding to the connectors are required. Welding is challenging because of the Post Weld Heat Treatment (PWHT) needed to reduce the hardness in the F22 HAZ while maintaining the required strength in the pipe. Theoretical evaluations were performed by means of metallurgical models and a potential solution was identified in grade P22-like steel (2¼ Cr - 1 Mo), with minor modifications with respect to the standard ASTM A335 and supplied in Q&T condition. A trial heat was cast and hot-rolled into pipes. After water quenching, the response to tempering was assessed by means of laboratory heat treatments and subsequent mechanical testing, together with metallurgical examination. Simulated PWHTs were also performed on Q&T material. 80 ksi grade P22 seamless pipes were finally produced and qualification involved mechanical testing before and after simulated PWHT: SMYS of 80 ksi and HV10 ≤ 250 requirements were met. The material also exhibited excellent toughness and resistance to HIC and SSC cracking.
Sponsorship	Ocean, Offshore and Arctic Engineering Division
File Format	PDF
ISBN	9780791855355
DOI	10.1115/OMAE2013-10252
Volume Number	Volume 3: Materials Technology; Ocean Space Utilization
Conference Proceedings	ASME 2013 32nd International Conference on Ocean, Offshore and Arctic Engineering
Language	English
Publisher Date	2013-06-09
Publisher Place	Nantes, France
Access Restriction	Subscribed
Subject Keyword	Water Cracking (materials) Welding Vickers hardness testing Steel Fracture toughness Pipeline risers Astm international Fracture (process) Heat Mechanical testing Quenching (metalworking) Risers (casting) Pipes Heat treating (metalworking)
Content Type	Text
Resource Type	Article

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