Is it allowed to create a blind flange according to ASME/ASTM?
Yes, it is permitted to make a blind flange out of plate.
The plate material should be in accordance with, e.g. ASTM A105, as it relates to carbon steel. A material certificate should be available, and the batch (charge) number should be, by an approved body are stamped into the flange. Use ASME B16.5/B16.47 for the dimensions and e.g. ASTM A105 for the material quality.
What are the NDE requirements?
In principle, there are no further non-destructive examinations necessary. That, however, depends on the mind of the customer.
asme b36.10, bundle, weldolet, lap joint, shielded metal arc welding, mss sp43, corner joint, wpq, butt joint, rockwell, astm a105, A106, a182, a194, edge joint, welded pipe, alloy steel, tube bending, butt weld, weld neck, threaded joint, welding performance qualification, stub-in, tee crosses, swing check valve, o'let, dye penetrant inspection, hot bolting, storage tanks, stainless steel, spiral wound, reducing o'let, spiral welding, pressure class, stub-on, spherical pressure vessel, seal weld, asme b31.2, b34.4, b31.5, b31.8, b31.9, b31.11, socket weld fitting, aluminium, slurry, extended spindle, carburizing, pressure class, slip-on flange, single random pipe length, maximum allowable span, mpi, segmental bore, branch connection, seat(s), magnetic particle inspection, safety valve, asme b31.3, reducing o'let, asme a312, pipeline pigging, reducing elbow, pump, plant north, true north, petro-chemical, seamless pipe, ultrasonic, pinch valve, drip leg, smaw, reduced port, astm a216, structure, a217, a234, 312, gtaw, branch table, shut-off valve, nps and schedule, vacuum box, welding procedure qualification record, vickers, lpi, nipolet, worlds largest valves, api spec 6a, metalic ring, anchor, liquid penetrant inspection, welding procedure specification, mannesmann, brinell, filled weld, carbon steel, crude oil storage tank, chain wheel, expansion joint, asme b16.48, MSS-SP-58, hot tap, MSS-SP-69, b16.34, b16.25, sandvik, ips and schedule, electric resistance welding, lap joint flange, explosion welding, globe valve, full port, gland, fuel gas hoses, gate valve, lokring, dynamically loaded, sockolet, full face gasket, longitudinally welding, forging, elastomeric gasket, dynamic seals, astm a530, a420, a403, a352, non-destructive examination, diverter valve, tig welding, asme boiler and pressure vessel code bpvc, asme a182, nde, distillation column, rt, needle valve, wpqr, disc, radiographic, column, non return valve, haz, flat face, nrv, camprofile gasket, api, trunnion, mss, barrel, reinforcing pad, eddy current, asme B36.10, backflow, killed carbon steel, astm 351, eddy current testing, grade cf8c, eccentric reducer, asme b36.10, din flanges, wps, weep hole, rigid support, asme b36.19, metal seated, butterfly, npt, asme b31.3, ball valve, quadrant edge, square edge bore, largest bolts, a335 gr p12, asme b31.1, glycerin, constantly loaded, discharge, gmaw, pressure gauge, pipeline pigging, mig welding, asme b16.47, stub end, charpy impact, oil and grease, asme b16.20, laser welding, graphite pads, a234 gr wp9, penetrant, asme b16.11, check valve, orbital, asme 16.21, api 600, a182 gr f22, asme b16.5, electrode, floating head, iris, nominal pipe size, asme B16.36, b16.47, thermowell, variable spring support, pressure testing