This standard specifies the epoxy resin coating applied to the inner surface of coated steel pipes for water transport, mainly used for sewerage, industrial water, and agricultural water. However, this does not apply if the pipe is used for water supply.
JIS G 3443-4:2007 history
2020JIS G 3443-4:2020 Coated steel pipes for water service -- Part 4: Internal epoxy coatings
2014JIS G 3443-4:2014 Coated steel pipes for water service -- Part 4: Internal epoxy coatings
2007JIS G 3443-4:2007 Coated steel pipes for water service -- Part 4: Internal epoxy coatings