NB/T 47019.6-2011: Purchase technical specification for boiler and heater exchanger tubes/pipes. Part 6: Ferrite/austenite duplex steel

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Scope

This part specifies the designation, technical requirements, test methods,
inspection rules, packaging, marking and quality certificate requirements for the
ferrite/austenite duplex seamless steel tube used for heater exchanger.
This part applies to the cold drawing (rolling) ferrite/austenite duplex seamless
steel tube which is resistant to normal corrosion and stress corrosion.

Basic Data

Standard ID	NB/T 47019.6-2011 (NB/T47019.6-2011)
Description (Translated English)	Purchase technical specification for boiler and heater exchanger tubes/pipes. Part 6: Ferrite/austenite duplex steel
Sector / Industry	Energy Industry Standard (Recommended)
Classification of Chinese Standard	J75
Classification of International Standard	27.060.30
Word Count Estimation	5,526
Date of Issue	2011-07-01
Date of Implementation	2011-10-01
Quoted Standard	GB/T 222; GB/T 223.1; GB/T 223.2; GB/T 223.3; GB/T 223.4; GB/T 223.5; GB/T 223.6; GB/T 223.7; GB/T 223.8; GB/T 223.9; GB/T 223.10; GB/T 223.11; GB/T 223.12; GB/T 223.13; GB/T 223.14; GB/T 223.15; GB/T 223.16; GB/T 223.17; GB/T 223.18; GB/T 223.19; GB/T 223.20; GB/T 223.21; GB/T 223.22; GB/T 223.23; GB/T 223.24; GB/T 223.25; GB/T 223.26; GB/T 223.27; GB/T 223.28; GB/T 223.29; GB/T 223.30; GB/T 223.31; GB/T 223.32; GB/T 223.33; GB/T 223.34; GB/T 223.35; GB/T 223.36; GB/T 223.37; GB/T 223.38; GB/T 223.39; GB/T 223.40; GB/T 223.41; GB/T 223.42; GB/T 223.43; GB/T 223.44; GB/T 223.45; GB/T 223.46; GB/T 223.47; GB/T 223.48; GB/T 223.49; GB/T 223.50; GB/T 223.51; GB/T 223.52; GB/T 223.53; GB/T 223.54; GB/T 223.55; GB/T 223.56; GB/T 223.57; GB/T 223.58; GB/T 223.
Regulation (derived from)	?National Energy Board Announcement 2011 No.3
Issuing agency(ies)	National Energy Administration
Summary	This standard specifies the heat exchanger ferritic/austenitic duplex stainless steel seamless pipe grades, technical requirements, test methods, logo and certification requirements, inspection rules, packaging. This section applies to general corrosion and stress corrosion resistance of cold drawn (rolled) ferritic/austenitic duplex stainless steel seamless pipe.