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KRUPP UHDE STANDARD February 1997

Vessels and equipment

FIELD FABRICATION

General specification

UN2000-01

Part 3

Behälter und Apparate; Fertigung auf Baustellen; Technische Lieferbedingungen Supersedes 89-02

1 ScopeIn addition to Krupp Uhde standard UN 2000-01 Part 1 or 2, this general specification applies to vessels andequipment, the size of which does not permit transportation in completed state, and which must therefore betransported in sections and assembled on site.

2 Scope of supplies and servicesUnless otherwise agreed upon, the following shall apply:

•  The vessel manufacturer shall perform all work required for the erection of the equipment concerned, as-sign supervising personnel, and provide auxiliary means such as tools, fixing elements, scaffoldings,welding equipment, electrodes, connecting cables including switchgears, cable connectors, valves, etc.from the main connection up to the place of erection.

•  Erection cranes will be provided.

•  Utilities such as air, water, electric power (for welding) will be made available to the vessel manufacturer.The supply of fuel gas and electric power (for heat treatment) shall be agreed upon. If possible, a lockablestorage room for small tools will be made available to the vessel manufacturer.

•  Earth and masonry works are not part of the vessel manufacturer's scope of supplies and services.

•  If the erection of the vessel is not performed by the vessel manufacturer but by an erection contractor, thevessel manufacturer shall elaborate detailed erection instructions including indication of the necessarytools and the sequence of erection, and a welding specification. The erection instructions shall also includethe scope of tests and details of the pressure test.

3 Fabrication of the vessel3.1 Pre-fabrication in the workshopWork on the job site shall be kept to a minimum. For this reason, as much of the vessel as possible shall bepre-fabricated.

To facilitate assembly on the job site, all components shall be marked properly. In the case of vessels of so-phisticated design, a test assembly shall be performed in the workshop. Adequate measures shall be taken to prevent deformation during transport. Welding bevels which have beenprepared in the workshop for field welding shall not be used for the test assembly. Tack welds on claddingsand alloyed linings are not permitted.

3.2 Fabrication on site All vessel components shall be mounted and welded according to the workshop markings.

The components shall be aligned by means of spacer plates, wedges, clamping devices, etc. Welding-on of erection aids shall be kept to a minimum. Refer to Krupp Uhde standard UN V416-01 Part 1 „Welded joints for vessels and equipment“ for the welding-on and removal of the erection aids.

Hammering on claddings or linings is not permitted.

The gap between reinforcement plate and shell shall not exceed 3 mm. The reinforcement plates shall not betack welded but only clamped prior to welding.

4 WeldingPreparation and performance of the welding work shall be effected according to Krupp Uhde standard

UN V416-01 Part 1.

Date Prepared Date Checked Date Approved

 © 1997 Krupp Uhde GmbH Technical discipline: EN-EP

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Page 2 UN 2000-01 Part 3

5 Heat treatmentHeat treatment shall be effected according to Krupp Uhde standard UN V416-01 Part 1. The heat treatmentprocess and the power requirement shall be specified by the vessel manufacturer in his quotation, but in nocase later than the contract award.

6 Tolerances

Dimensional checks shall be performed during fabrication in order to ensure that the dimensions of the vesselare within the tolerance ranges specified in Krupp Uhde standard UN 2000-02 Part 1. The specified fabricationtolerances may only be obtained by cold forming if they are less than 5%.

7 Inspection and testsUnless otherwise specified in the purchase order documents, the requirements contained in Krupp Uhdestandards UN 2000-01 and UN V416-01 Part 1 as well as the applicable codes and standards apply. The testsshall be performed in the presence of the Krupp Uhde inspector or the inspector of Krupp Uhde's client.

Test reports including evaluation shall be supplied for all tests performed.

Reference standardsKrupp Uhde standards:UN V416-01 Part 1 Welded joints for vessels and equipmentUN 2000-01 Part 1 Pressure vessels, general specification