We want to explode Bill of Material automatically at time of Order entry and explode an Equipment BOM in the sales order?

Use an item category that is configured for bills of material for having a sales BOM to explode automatically. Standard SAP item categories are : TAQ - Pricing and inventory control take place at the BOM header level TAP - Pricing and inventory control take place at the BOM item level These can be automatically derived using the item category groups ERLA and LUMF, respectively.