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Radius of carbon steel welding elbows. What about it?

27 October 2023

There is much confusion about the radius of carbon steel welding elbows. With the (old) type designations such as 3S, 1.5D and 5D, the impression is given that this can be used to calculate the radius. This is not the…

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ASTM / ASME Flanges and Fittings

12 July 2023

Besides the range of steel and stainless steel DIN flanges and fittings GNS now also conducts a complete program ASTM / ASME dimensions and pressure classes. These products can usually be delivered from stock and optionally with 3.1 certificate. For…

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Collars and collar plates for lap-joint flanges. How about it?

27 April 2023

There is quite a bit of confusion about the rings and collars that can be used to connect pipe with a lap-joint flange. There are 6 types of rings and collars standardized according to the applicable standard - EN1092-1. Five…

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Round bar, flat bar and cut-to size blocks in 25CrMo4 (1.7218)

08 February 2023

The quality 25CrMo4 (1.7218) is a high temperature resistant alloyed quench and tempering steel that is frequently used for parts that require high toughness in addition to a high load. Due to its chemical composition, 1.7218 (AISI 4130) is suitable…

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Cutting and folding of spring steel

06 February 2023

Spring steel in a hard(ened) condition and folding is in many cases a difficult - or even - impossible combination. Depending on, for example, the tensile strength of the raw material, material thickness and the operations to be performed, products…

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