All brick linings on vertical flat casing shall be tied back to and supported

All brick linings on vertical flat casing shall be

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All brick linings on vertical flat casing shall be tied back to, and supported by, the structural steel framing members. All tie members shall be austenitic alloy material, except that pipe supports located in the backup layer may be carbon steel. At least 15% of the bricks shall be tied back. It is not necessary for the brick lining on the cylindrical casing to be tied back if the radius of curvature of the casing keys the bricks. 6.2 Brick linings shall be supported by metal support shelves (lentils) attached to the casing on vertical centers typically 1.8 m (6 ft) high but not to exceed 2.3 m (12ft) based on calculated loads and thermal expansions. Support shelves shall be slotted to provide for differential thermal expansion. Shelf material is defined by the calculated service temperature at the tip of the shelf; carbon steel is satisfactory up to 370°C (700°F). 6.3 Expansion joints shall be provided in both vertical and horizontal directions of the walls, at wall edges and around burner tiles, doors and sleeved penetrations.
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Refractory Lining and Burner Brick Requirements API 560 Revision Date: May 3, 2011 7 6.4 Radiant chamber walls of gravity construction (Figure 1) shall not exceed 7.3m (24 ft) in height and shall be at least high duty firebrick. The base width shall be a minimum of 8% of total wall height. The height to width ratio of each wall section shall not exceed 5 to 1. The walls shall be self supporting and the base shall rest on the steel floor, not on another refractory. Figure 1: Illustration of Gravity Wall dimensional requirements 6.5 Gravity walls shall be of bonded, mortared construction. The mortar shall be air setting and compatible with firebrick. 6.6 Vertical expansion joints shall be provided at gravity wall ends and required intermediate locations. All expansion joints shall be kept open and free to move. If the joint is formed with lapped brick, no mortar shall be used, that is, it shall be a dry joint. 6.7 Target walls with flame impingement on both sides (free standing) shall be constructed of super duty fireclay brick with at least a 1540°C (2800°F) rating. Bricks shall be laid with mortared joints. Expansion joints shall be packed with ceramic fiber strips having a maximum use temperature not less than 1430°C (2600°F). 6.8 Floor brick shall not be mortared. A 13 mm (0.5 in) gap for expansion shall typically be provided at 1.8 m (6 ft) intervals. This gap may be packed with fibrous refractory material having similarly maximum use temperature, in strip, not loose bulk, form. Floor brick shall be a minimum 63 mm (2.5 in) thick of high duty firebrick. 6.9 Mortar joints shall cover all contact surfaces and be 2mm (1/16 inch) thick maximum. 6.10 Maintenance/Repair: The mechanical function of supports, tie backs and expansion joints must be taken into consideration when repairing brick linings. Repairs are
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Refractory Lining and Burner Brick Requirements API 560 Revision Date: May 3, 2011 8 generally made by replacing or refurbishing entire structural units such as the entire lift
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  • Spring '18
  • Furnace, Refractory, Refractory materials, Owner/Fabricator

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