NSPS Notebook
Primary Emissions from Basic Oxygen Process Furnaces for which Construction Commenced after June 11, 1973 -  Subpart N

Applicability: eCFR Subpart N [ecfr.gov]

This subpart applies to:
  1. Basic oxygen process furnaces that commence construction or modification after June 11, 1973.

Definition of "Basic Oxygen Process Furnace":
  1. Any furnace with a refractory lining in which molten steel is produced by charging scrap metal, molten iron, and flux materials or alloy additions into a vessel and introducing a high volume of oxygen-rich gas.
  2. Does not include open hearth, blast, and reverberatory furnaces.
Known Sources in NDEE Jurisdiction:
Date of Original Final Rule: 3/8/74
Amendments Dates: 10/17/2000 (65 FR 61744)
02/14/1989 (54 FR 6667)
01/02/1986 (51 FR 160)
04/13/1978 (43 FR 15602)
07/25/1977 (42 FR 37937)
State Regulations: Title 129, Chapter 12, Section 001.22

Previoulsly: Chapter 18, Section 001.44
Federal Regulations: 40 CFR 60.140
Related Rules:

NSPS - 40 CFR Part 60

Subpart Na - Secondary emissions from basic oxygen process furnaces
Subpart AA - Electric arc furnaces (EAF)
Subpart AAa - EAF and argon-oxygen decarburization vessels

NESHAP - 40 CFR Part 63
Subpart CCC - Steel pickling plants
Subpart EEEEE - Iron and steel foundries
Subpart FFFFF - Integrated iron and steel
Subpart YYYYY - EAF
Subpart ZZZZZ - Iron and steel foundries
Regulations and Federal Registers: eCFR Subpart N [ecfr.gov]
FAQs, Fact Sheets, and Rule Summaries: Rule Flowchart - Texas CEQ [tceq.state.tx.us]
Other Information and Resources:
Page Last Updated: 12/20/22