NORMAPLAST hose fittings Germany NORMAPLAST model NORMAPLAST price

NORMAPLAST hose fittings are connection tools between pipes, serving as detachable connection points between components and pipes. Main pipe fittings come in a wide variety; commonly used pipe fittings are generally classified into hard pipe fittings and hose fittings. Hard pipe fittings include flared, ferrule-type, and welded types, while hose fittings are primarily crimped rubber hose fittings. A ferrule-type pipe fitting consists of three parts: the fitting body, the ferrule, and the nut. When the ferrule and nut are placed on the steel pipe and inserted into the fitting body, tightening the nut causes the outer side of the ferrule's front end to fit against the conical surface of the fitting body, and the inner cutting edge uniformly bites into the seamless steel pipe, forming an effective seal. It is a sealed pipe fitting suitable for non-corrosive or corrosive media such as oil, water, and gas. The specification requirements for matching aluminum-plastic pipes are relatively flexible. After connection to the pipeline, it features reliable connection and good sealing performance.

NORMAPLAST hose fitting working principle

1, the basic structure of this fitting is relatively simple, consisting of only three basic parts: the fitting body, the ferrule, and the nut. The main component is the ferrule, which is a metal ring with a cutting edge at the front. International standard GB3764-83 recommends unifying the cutting edge into a I shape. 2, the ferrule, which plays the main sealing role in this fitting, moves axially along the inner conical hole of the fitting body under the axial force of the nut R that provides clamping. Simultaneously, the cutting edge end undergoes radial contraction under the radial reaction force R', eliminating the gap between the ferrule and the pipe, causing the cutting edge to contact the pipe surface. At this point, the pipe no longer rotates; continuing to rotate the nut ensures the ferrule cutting edge firmly bites into the pipe to secure the seal. Another sealing stage is formed by the tight contact between the intersection line (edge) of the 13° chamfer at the ferrule cutting edge end and the outer circle, and the annular conical surface of the fitting body, creating a sealing band. This is the main sealing area of the ferrule-type seal. The tail 86° conical surface of the ferrule undergoes radial contraction under the force of F, tightly gripping the connected pipe. Meanwhile, the middle part bulges slightly, giving the ferrule axial elastic deformation, which benefits both the ferrule seal and prevents the clamping nut from loosening.

NORMAPLAST hose fitting common problems

1, when clearing residue during water pipe connection, completely remove various residues from the pipeline. This prevents valve core damage, blockages, clogging, and leaks. Meanwhile, clean the surface to prevent residual construction materials. 2, do not apply excessive force during switching. For any household accessory, you do not need to apply excessive force when switching; simply shake or rotate it. Even traditional home renovations do not require excessive effort to tighten them. In particular, do not use the handle as a railing for support. After a period of use, disassemble and clean products with outlet filter screens to remove residues. Products with plastic hoses should be kept in a naturally stretched state to prevent rupture. 3, for home renovation tee fittings, keep household hose fittings' shower metal bellows in a naturally stretched state. Do not wrap it around the faucet when not in use. Meanwhile, regardless of use, ensure no dead angles form at the connection between the plastic hose and the valve body to prevent hose rupture or damage. 4, pay attention to regular cleaning. Domestic water pipe connectors that are not used for long periods may also lead to incomplete closure, water leakage, loose handles, loose connectors, and leaks, which customers can often handle themselves.

NORMAPLAST hose fitting manufacturing process

Tee fitting forming involves flattening a pipe blank larger than the tee diameter to approximately the tee diameter size, and opening a hole at the branch pipe stretching location; the pipe blank is heated, placed into a forming mold, and a punch mold for stretching the branch pipe is inserted inside the pipe blank; under pressure, the pipe blank is radially compressed, and during radial compression, metal flows toward the branch pipe direction and forms the branch pipe under the stretching of the punch mold. The entire process forms the shape through radial compression of the pipe blank and stretching of the branch pipe section. Unlike hydraulic bulging tees, the metal of the tee fitting branch pipe is compensated by the radial movement of the pipe blank, so it is also called the radial compensation process. Since hot-pressed tees are used, the equipment tonnage required for material forming is reduced. Hot-pressed tees have wider adaptability to materials, suitable for low-carbon steel, alloy steel, and stainless steel materials; especially for large-diameter tees with thicker walls, this forming process is typically adopted.

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