The purchased coiled tubes have splice welds; what information does the manufacturer need to provide?
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As the title suggests, I would appreciate some guidance from all the teachers
The simplest way for this is to ask the inspection officer from the Special Inspection Agency who is in charge of supervising your company. Or look at the drawings. Since the diameter of the coil is generally not large, such as an outer diameter of 45/57, it does not need to be classified as a pressure vessel. In my opinion, first, the quality certificate for the pipes. Second, welding records. III. Weld non-destructive testing report. IV. Hydrostatic test report.
It is also necessary to evaluate the supplier to determine whether it possesses the required qualifications.
Organization qualification: Whether it is a qualified supplier on your organization’s list of approved suppliers. If it is a qualified supplier, the following must also be provided: 1 certificate of material for the pipe material, and a certificate of material for the welding materials ； 2 Non-destructive testing report (if required) 3. Pipe pressure test report (if required) 4. Ball passing test record (if required). Welding records may not be provided.
The technical contract or specifications for purchased coils should specify whether seams are allowed; if so, requirements regarding the welding of such seams, non-destructive testing, ball testing, and hydrostatic testing must be outlined. If these requirements are not specified at the time of purchase, it will be necessary to negotiate with the manufacturer.
In fact, many pipe bending manufacturers do not possess the technical capabilities mentioned above; they only have the ability to bend pipes using bending machines. For this type of coil, you need to conduct flaw detection and pressure testing by yourself after purchasing it.
The situation isn’t clear – what medium is used in this coil? What is the nominal diameter? If the inner diameter is less than 150 mm, it is not governed by TSG21-2016; typically, a certificate of conformity for the coiled tube components, a quality certificate for the pipe material, welding records, macroscopic inspection records, pressure test records, and so on are required. For the technical requirements specified for coiled tubes in general design drawings, supporting documentation must be provided.