HVA NIRO® Stainless steel pipe bends

Our speciality are thin-walled pipe-bends with large bending radius, especially for pneumatic conveying systems. The pipe-bends are cold-bent without any pleats on CNC-mandrel machines. Our quality management generally guarantees: welded seam smoothed or shaved (DIN 11 850 resp. DIN 17 457) absolutely wrinkle-free, no start-up bulges no scratching or scoring extremely low ovality visually aesthetic surface leg extension each side deburred sawing edges

In pneumatic conveying systems, conveying abrasive products – in particular at high conveying speeds – leads to abrasion and thus to wear in the pipe bends. In order to prevent this, the pipe bend of our highly wear-resistant DWR double-skin stainless pipe bends is encased in a second pipe bend, which creates a double-walled chamber. This acts, so to speak, as a “protective shield”: After the wear has taken place on the internal pipe bend, it fills with the product to be conveyed. When this process is completed, you are then conveying „product on product“ – and no further wear is possible! Version I: „Product-on-product” In this variant, the classic “double skin” comes into effect. not suitable for foodstuffs not suitable for material change Version II: „Lined with concrete” lined with extremely hard concrete colour: light grey not suitable for foodstuffs also available: lined with borosilicate glass

Glass pipe bends For conveying abrasive media or for high flow rates, we can supply you with glass pipe bends made from 3.3 borosilicate glass with a copper grounding strip. These have a service life at least 10 times longer than that of stainless steel pipe bends. made of 3.3 borosilicate glass leg extension 200 mm copper grounding strip attached at the outer radius

We produce aluminium pipe bends with the following characteristics and product specifications: DIN EN 573-3, 755-1, /-2 /-9