Spectacle Blind Flange products is a solid plate used at the connection of two flanges to block pipeline equipment, etc., or a common steel plate. The purpose is to test pressure, leak test and block pipelines of pipeline equipment.
The product pipe size ranges from ½" to 96", and the flange grade ranges from 150# to 10,000#. Blind flange products use convex or annular tongue and tongue to join the surface of the gasket. Blind flange products have two series, A (MSS SP44) or B (API 605), which conform to ASME/ANSI B16.5 and B16.47 specifications.
The production process of Spectacle Blind Flange products is mainly divided into four types: forging, casting, cutting and rolling.
The cast Spectacle Blind Flange products have accurate rough shape and size, small processing volume and low cost, but have casting defects (pores, cracks, inclusions); the internal structure of the casting is poorly streamlined (if it is a cutting part, the streamline is worse);
The advantage of castings is that they can produce more complex shapes and lower costs;
The production process distinguishes the difference between cast flanges and forged flanges. For example, Spectacle Blind Flange products are a type of cast flange.

Spectacle Blind Flange products belong to the precision casting method to produce flanges. Compared with ordinary sand casting, the structure of this type of casting is much finer, and the quality is improved a lot. It is not prone to problems such as loose structure, pores, and trachoma.
First of all, we need to understand how Spectacle Blind Flange products are produced, the process method and products of centrifugal casting to make flat welded flanges, and the feature is that the product is processed through the following process steps:
① Put the selected raw material steel into an intermediate frequency electric furnace for smelting, so that the temperature of molten steel reaches 1600-1700℃;
②Preheat the metal mold to 800-900℃ to maintain a constant temperature;
③Start the centrifuge, and pour the molten steel in step ① into the metal mold after preheating in step ②;
④The casting is naturally cooled to 800-900℃ and kept for 1-10 minutes;
⑤Cool it with water to near normal temperature, demould and take out the casting.
To purchase Spectacle Blind Flange products, please contact our company. We have many years of production experience and quality assurance. Now send us an email consultation.