Jobs are under threat at the Tata Steel plant on Shotton as production is cut at the site.
The company has revealed that one of the two galvanising lines at the plant will be mothballed - as cheap Chinese imports and the strong pound hit the business.
It is understood around 40 roles could be affected at the site which employs 800 workers.
A spokesman for Tata Steel said they have told employees that they will be reducing operating capacity in hot dipped galvanising at the business in Shotton.
He added: "One of our two galvanising lines will come out of production but will be retained so it can be restarted in more favourable market conditions.
“Our 2nd galvanizing line at Shotton will be ramped-up to full-time operation.
“We continue to be in discussions with employees, their representatives and the employers of contractors and agency staff about possible implications for employment levels.
"Every effort will be made to redeploy any affected employees within the business.”
READ: Strike action averted at Tata Steel in Shotton
They said the changes at Shotton will help them reduce costs and enable us to continue our focus on manufacturing higher-value products.
It comes as a global economic slowdown hits demand and the UK is faced with surging imports and the strong pound.
Shotton is part of Tata Steel Colors and is the company’s premier location in Europe for the production of a unique range of metallic and paint coated products for the construction and domestic appliance sectors.
Tata has several other operations on the Shotton site including units for the manufacture of composite profiled panels from organic painted steel strip.
Alyn and Deeside AM Carl Sargeant said: “Tata is a major employer on Deeside and I’m sad to hear there could be job losses as one of the lines is mothballed.
“I urge Tata to stay true to their word and do their utmost to redeploy any workers that may be affected to another part of the business.
"It’s also good to know that the firm has said it would restart the line if market conditions improve.
“If the worst should happen and redundancies are made then of course this will be devastating for the workers and their families.
"If this happens I will write to the Minister for Economy, Science and Transport, Edwina Hart, to ask how she can support these people in finding alternative employment.”
