NEW YORK — Wheatland Tube Co. has raised prices on continuous weld pipe, sprinkler pipe and A106 seamless material by 5 percent and has boosted tags on grade B electric-resistance weld (ERW) pipe by $50 per ton ($2.50 per hundredweight) effective at the close of business March 5, according to a letter sent to customers.

The rising cost of flat-rolled steel prompted the price hike, the Sharon, Pa.-based subsidiary of Chicago’s JMC Steel Group Inc. said. The boost is effective with all new orders and outstanding quotations, but Wheatland will ship orders already on the books at previously acknowledged prices, it said.

Montreal-based Nova Tube Inc. followed Wheatland’s move by announcing plans to raise prices on grade B ERW pipe by $50 per ton ($2.50 per cwt) and ERW A-795 schedule-10 material by 5 percent effective at the close of business March 6. Nova cited growing flat-rolled steel and transportation costs as the reasons for the price hike.

In addition, North Kansas City, Mo.-based ExlTube Co. said that it will raise prices on A-53 standard products by a minimum of $50 per ton ($2.50 per cwt) effective late March 6. The company said that orders currently on the books will be price-protected for shipments on or before the original confirmation dates.