AP Energy Products is manufacturing and exporting firm that offers a wide range of API 20E Bolting, which has proven results as a filler wire in many applications. API 20E Bolt has, by virtue of its contents of tungsten, chromium, molybdenum, and controlled iron. API 20E standard specifies requirements for the qualification, production and documentation of Alloy and Carbon Steel Bolting for Use in the Petroleum and Natural Gas Industries. The API 20E specification establishes three bolting specification levels (BSL-1, BSL-2 and BSL-3). These BSLs define ascending levels of technical, quality and qualification requirements. Increasing levels of severity reflect increased consequence of bolting failure. To ensure material traceability, the raw material is procured only from steel mills. We manufacture to below bolting grades. Huge emphasis is laid on the traceability of the material using heat-numbers, heat lots and production lots. Qualification to a higher BSL shall qualify to a lower BSL. The following paragraphs describe the conditions which, when met, allow the bolting to meet the appropriate bolting type and BSL classification level.