ASTM Standard A820 has established three (3) classifications of stainless steel fiber which are as follows:Benefits related to the use of metallic fibers include:Controlled and uniform cracking of the refractory liningStrength retention of the refractory lining,Minimize permanent linear change,Increased lining toughnessImproved thermal shock resistanceIncreased Lining ToughnessThe effectiveness of...

The typical refractory anchor has the tip of the longest leg of the anchor that is not greater than 1” (25mm) from the surface of the refractory lining. Some specifications require that other leg of this anchor be ½” (13mm) shorter than the long leg of the anchor which would place the tip of this anchor 1 ½” (38mm) from the surface of the refractory lining. These offset legs are used to prevent ...

The stud welding of anchors has gained acceptance over the past decade. There are numerous applications that utilize stud welding however this installation method should follow the same quality control guidelines (PRQ and WPS) as required for welded metallic anchors.

The material used to fabricate the refractory anchor should be selected based on the operation conditions and service of the lining. Typically, the choice of the anchor material is based on the long term exposure to the operating temperature however other factors such as intermittent operation and corrosion.

PMI (Positive Material Identification) should be incorporated to determine the metallic grade of the refractory anchor. This requirement may be waived, if the API method of color coding has been implemented or the material grade has been etched on to the surface of the anchor. Knowledge and verification of the anchor material will assist in the qualification of the weld procedure and personnel qua...

here are many different anchors shapes used in the design of refractory lining. The anchor type of anchor chosen for the refractory linings is typically determined by the lining designer and is based on the type material being installed. Refractory anchors can range from simple metallic “vee” to ceramic anchors. As shown below anchors come in many different shapes and styles as shown with a few ...

All refractories require anchorage systems such as wire formed anchors, formed metal (for example, hexmetal) or ceramic tiles to support the refractory linings. The anchorage used for refractories on roofs and vertical walls are more critical as they must remain able to support the weight of refractories even at the elevated temperatures and operating conditions.The commonly used anchorages have c...