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DIN 1629 Seamless Circular Unalloyed Steel Tubes Subject to special requirements.
In keeping with current practice in standards published by the International Organization for Standardization (IS a comma has been used throughout as the decimal marker.
The subclauses marked with a single dot give specifications which are to be agreed upon at the time of ordering.
The subclauses marked with a two dots give specifications which optional and may be agreed upon at the time of ordering.
1.Field of application
1.1 This standard applies to seamless circular tubes and pipes(hereinafter briefly referred to as “tubes”) made of unalloyed steels as listed in table 1. These tubes are predominantly used in the constructin of chemical plant, vessels, pipework and for general mechanical engineering purposes. They are designed to meet high performance requirements. Normally there are no limiting vaiues or the maximum permissible working pressure of these tubes. The permissi l working temperature shall not exceed 300℃ are specified in Appendix A.)
The limits of application and other specifications given in this standard shall apply except in cases here other specifications are contained in codes of practice for specific fields of application, e.g. the Technische Regeln fur Dampfkessel (TRD) (Technical rules on steam boilers) or the Technische Regeln fur Druckbehalter (TRB)
(Technical rules on pressure vessels), AD-Merkblatter (AD Instrucation sheets).
1.2 This standard does not apply to
– seamless circular unalloyed steel tubes subject to special requirements(DIN 1629);
– seamless circular steel tubes for structural steelwork (see DIN 17121);
– seamless creep-resisting steel tubes (see DIN 17175);
– seamless precision steel tubes (see DIN 2391 Part 2);
– medium-weight threaded steel tubes (see DIN 2440);
– heavyweight threaded steel tubes (see DIN 2441).
2. Classification into grades
This standard covers tubes made from the steel grade shown in table 2.
The selection of the steel grade is at the purchaser’s discretion
| Outside diameter damm | Maximum permissible working pressure bar max. | Permissible working temperature ℃ max | To be suppled with document |
| da≤219,1 | 64 | 300¹) | DIN 500 49 – 2.2 |
219.1| 25 | | ||
| da>660 | 16 | ||
| Any | 160 | 300¹) | DIN 50049 – 3.1 A or DIN 50049 – 3.1 B or DIN 50049 – 3.1C |
| ¹) See Appsndix A for stregth characteristics | |||
Research use only,Commercial use is prohibited.
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