import type { FlangeSpecInput, FlangeSpecResult } from './types.js';
/**
 * Look up flange specifications from ASME B16.5 standard
 *
 * @reference ASME B16.5 Pipe Flanges and Flanged Fittings
 * @throws {RangeError} EN 1092-1 support not yet implemented. Use ASME_B16_5.
 * @throws {RangeError} Unknown flange size: {nps}
 * @throws {RangeError} Pressure class {pressureClass} not available for size {nps}
 * @param input - Flange standard, pressure class, nominal size
 * @returns Flange dimensions (OD, thickness, bolt pattern, weight)
 */
export declare function flangeSpec(input: FlangeSpecInput): FlangeSpecResult;
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