API 662:2006 pdf download
API 662:2006 pdf download.Plate Heat Exchangers for General Refinery Services- Part 1- Plate -and- Frame Heat Exchangers.
6.2 Final records
6.2.1 The vendor shall furnish the purchaser with a users manual, which shall contain the following:
a) technical description:
b) assembly instructions;
C) operating instructions;
d) installation and maintenance instructions (including lifting and handling);
a) spare parts 11st
1) data sheets and drawings (as-built).
6.2.2 The vendor shall retain, for at least five years, records which confirm compliance of the material and
fabrication with the requirements of this part of ISO 15547.
7 DesIgn
7.1 General
7.1.1 The frame and tie bolts of the gasketed or semi-welded plate-and-frame heat exchanger shall be designed to permit the future installation of at least 20 % additional plates.
7.1.2 Gasketed plates shall be replaceable individually, and semi-welded plates in pairs, without having to remove any other plate.
7.1.3 The plate pack shall incorporate means for positive alignment of the plates and gaskets.
7.2 Design temperatures
7.2.1 The purchaser shall specify a maximum design temperature and a minimum design metal temperature.
7.2.2 The design temperatures shall be used for the design of all pressure-retaining components.
7.3 Design pressure
Unless otherwise specified or approved by the purchaser, the plate-and-frame heat exchanger shall be designed for design pressure on either side, with atmosphenc pressure or. if specified, vacuum on the other side.
7.4 Fouling margin
The purchaser shall specify a percentage fouling margin, F, calculated by
7.5 CorrosIon allowance
7.5.1 Corrosion allowance, if specified, shall apply to unlined connections only.
7.5.2 The corros4on allowance for plate material shall be zero.
7.6 Components
7.6.1 Plates shall conform to the following:
a) the nominal thickness of gasketed plates before being pressed shall be sufficient to meet design conditions but shall not be less than 0,5 mm (0,02 in):
b) the plates shall be fully supported by the carrying bar:
C) the plates shall be designed to meet the design conditions without the need of additional shifeners attached to the plate, unless otherwise approved by the purchaser;
d) the thickness of pass plates shall be sufficient to withstand the total stream pressure drop across the port area;
e) the wetted surfaces of supports for pass plates shall be of the same material as the plates;
f) all gasketed and semi-welded plates shall have permanently stamped identification for proper assembly;
g) end plates shall be furnished at the fixed and movable covers.
7.6.2 Fixed and movable covers shall conform to the following:
a) Covers designed with the use of stiffeners shall require approval of the purchaser:
b) Covers shall be furnished with slotted holes for tie bolts. The design shall mechanically restrain the tie bolts or nuts from turning.
7.8.3 Tie bolts and nuts for gasketed and semi-welded plate packs shall conform to the following:
a) the nominal diameter of he bolts shall be at least 16 mm (5/8 in);
b) each tie bolt shall have one captive nut and at least one running nut. The length of each nut shall be greater than or equal to that of a heavy hexagonal type;
C) hardened steel washers shall be provided under all rotating nuts;
d) each tie bolt shall be supplied greased and with a plastic sleeve to protect it from the environment,
7.6.4 The carrying bar for gasketed and semi-welded plate-and-frame heat exchangers shall conform to the following:
a) the bearing surface shall permit easy sliding of the plates and movable cover along the entire length of the carrying bar;
b) the carrying bar shall be designed to support at least 1.5 tImes the total mass of the movable cover and plate pack with the maximum number of plates filled with water (or the process fluid if its density is greater than that of water).
7.6.5 Gasketed and semi-welded plate-and-frame heat exchangers shall have a support column with a mounting foot located at the movable cover end. A minimum of two mounting feet shall be provided at the fixed cover. The vendor shall design the supports for the external loads specified in the equipment data sheet or requisition documents.
