Posted on April 2, 2019April 4, 2019 by Pulse AssentISO 21539:2019 Ships and marine technology. Testing specification for walkways using electrical resistance trace heating. Link: ISO 21539:2019 Ships and marine technology. Testing specification for walkways using electrical resistance trace heating. Source: BSI Standards Related Posts:Government scales up support to protect the world’s…£166 million cash injection for green technology and…Government sets out plan to make UK a global…UK and US agree to strengthen ties in science and technologyPlan to drive down the cost of clean heat