Patent ID: 8979413
Filing Date: 2015-03-17
Classification: B23K,E04G,Y10T

Abstract:
1. A method for manufacturing an element of a modular scaffolding system, comprising: providing an at least partly galvanized pipe part having a first end and a second end; providing an at least partly galvanized first connection head which is designed to be connected to the first end of the pipe part; forming, through welding, a weld which connects the first end of the pipe part to the first connection head, the weld comprising an internal weld surface and an external weld surface, which internal weld surface is proximal to the pipe part and/or the connection head, and which external weld surface is proximal to an outside environment of the pipe part and the connecting head; covering the external weld surface with a protective layer, such that the external weld surface is screened off from the outside environment; and permanently sealing off the internal weld surface against air, wherein the sealing is not performed by an additional surface treatment of the internal weld surface after the weld is formed; wherein, for the purpose of permanently sealing off the internal weld surface, one of the first end of the pipe part and the first connection head comprises an inside circumferential surface area, and the other of the first end of the pipe part and the first connection head comprises an outside circumferential surface area that is co-axial with, and designed for cooperation with the inside circumferential surface area; and wherein prior to welding, on at least one of the inside circumferential surface area and the outside circumferential surface area a sealing material has been applied; the method including positioning, prior to welding, the inside circumferential surface area opposite the outside circumferential surface area in order to bring the first end of the pipe part and the first connection head in a relative position in which they will be connected to each other through welding, in which relative position a passage is present that is embodied as a small clearance between the inside and outside circumferential surface areas; and melting, during welding, the sealing material between the inside circumferential surface area and the outside circumferential surface area such that after welding, the inside circumferential surface area and the outside circumferential surface area are mutually connected by the sealing material, whereby the clearance is sealed off by the sealing material in a fluid tight manner and by virtue thereof the internal weld surface is sealed off from air.