Full Description JIS G 3443-4:2020 specifies the requirements for epoxy coatings applied on the internal surface of mother pipes used mainly for industrial water works, agricultural water works and sewage works.
JIS G 3443-4:2020 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