NEW DELHI, June 29 (Reuters) - India has asked the European Union for relief from planned curbs on metal scrap exports as steel and aluminium makers warn the move could tighten supplies, raise costs and undermine gains from a trade pact, industry and government officials said. From May 2027, the EU's revised waste shipment regulation is set to bar exports of non-hazardous waste to countries outside the OECD group of mostly developed economies, unless the EU approves them by November 2026.