4 Inch Carbon Steel Pipe Flanges

The product information identifies ASME B16.5 and ASME B16.47 Series A and B standards, along with API standards for applicable flange options. ASME pressure classes include 150, 300, 400, 600, 900, 1500, and 2500. The appropriate standard and class should be selected against the piping design and project specification.

Twinco Industrial offers both rental and purchase options across its flange solutions. Rental options can support hydrostatic testing, vessel and process system isolation, maintenance shutdowns, turnarounds, and construction activities. Purchase options are available for ongoing piping, fabrication, maintenance, and project requirements.

These flanges are used in pipeline applications, industrial piping systems, hydrostatic testing, petrochemical projects, construction and welding, and manufacturing maintenance. Rental blind flange solutions additionally support pipeline testing, process system isolation, inspection shutdowns, plant operations, midstream projects, new construction, and turnarounds.

The listed ASME pressure classes are 150, 300, 400, 600, 900, 1500, and 2500. API options are identified with ratings from 2,000 to 15,000 PSI. Verify the required pressure class or API rating against the project specification, operating conditions, flange face, and connected piping components.

Rental blind flanges are listed with Raised Face, Flat Face, RTJ, and Seal Ring Groove face options. Face selection should match the mating flange and sealing arrangement in the piping system. Rental kits may also include studs and nuts, supporting isolation and testing requirements when specified.

The rental blind flange information states that equipment is inspected and quality-controlled before delivery. Rental offerings may include studs and nuts kits, while warehouse operations prepare and stage blind flanges and accessories for testing projects. Confirm kit contents, inspection requirements, and the exact configuration when requesting a quote.