Blind Carbon Steel Pipe Flanges

Blind carbon steel pipe flanges are used to close piping ends, vessel nozzles, and process connections. Product applications include hydrostatic testing of pipelines, vessel and process-system isolation, maintenance and inspection shutdowns, petrochemical plant operations, pipeline and midstream projects, new construction, and turnarounds.

Twinco Industrial lists blind flanges for both rental and purchase, depending on the product configuration. Rental options are suited to temporary hydrostatic testing, shutdowns, inspection work, and construction activities. Purchase options support permanent piping installations and recurring maintenance requirements. Availability, specifications, and commercial terms should be confirmed when requesting a quote.

Available flange-face options include Raised Face, Flat Face, Ring Type Joint, and Seal Ring Groove configurations. The correct face depends on the mating flange, gasket or sealing arrangement, pressure-class requirements, and the piping or equipment connection. Provide the required face type with the inquiry so the supplied flange matches the intended assembly.

The listed blind flange range includes sizes from ½ inch to 72 inches and pressure classes from 125# to 2500#. Another flange listing includes ASME pressure classes 150, 300, 400, 600, 900, 1500, and 2500. Confirm the required nominal size, class, standard, and facing because availability varies by configuration.

The product information identifies ASME B16.5 and ASME B16.47 materials for rental blind flanges, within the ASME B16 Series. The broader flange range also lists API Standards and API ratings from 2,000 to 15,000 PSI. The applicable standard should be confirmed against the project specification and connection requirements before ordering.

Rental blind flange offerings include rental studs and nuts kits, helping customers prepare a complete assembly for testing or isolation work. Kit requirements should be checked against the flange size, pressure class, facing, connection, and project specification. Request the complete configuration when seeking a quote so compatible accessories can be identified.