Table of Contents
DISCLAIMERSANDCOPYRIGHT
PREFACE
HISTORYOFDEVELOPMENTOFTHESTANDARD
ACKNOWLEDGEMENTS
ACCREDITEDSTANDARDSCOMMITTEEB109
TABLEOFCONTENTS
1.0Scope
2.0Definitions
3.0General
4.0DesignRequirements
4.1RegulatorValveBody
4.2DiaphragmCasingAssembly
4.3Diaphragm
4.4LoadingSpring
4.5ValveLinkageandDisk
4.6Orifice
4.7ExteriorSurface
4.8Vent
4.9Markings
5.0QualificationTestforServiceRegulator
Performance
5.1General
5.2TestEquipment
5.3TestProcedures
APPENDIXA:GUIDELINESFORPRESENTATIONOF
REGULATORPERFORMANCEDATA
APPENDIXB:SI(METRIC)SYMBOLS
APPENDIXC:US(INCH-POUND)SYMBOLS
FORMFORPROPOSALSONANSIB109.4 Abstract
A basic standard for the safe and reliable operation, and the substantial and durable construction of self-operated diaphragm type natural gas service regulators, for nominal pipe size of 1-1/4 inches and smaller with outlet pressure of 14 inch water column or less.
