Yes, your entire order history is available online regardless of how you placed the order. Also any repeat orders, where you have previously placed them over the phone can now be made easily online using the repeat order feature that enables you to add line items to your shopping cart from an existing order.
To view your order history select My Account, then "Order history" where you can search through your historical records using either your Linde order reference number, delivery note reference or your PO or reference number.