For VWR and BOC Gases, no. Go to the SAPweb home page and click on Find a Requisition. Search for your orders by entering your username in the Userid field and specifying a date range. The requisition will appear immediately. The PO will be listed about an hour after the requisition is approved and released.
Mornings are generally best for doing Web activity, as the Internet is generally less busy.
Your authorizations for what you can order and how much you can spend are set up in the Roles database by your supervisor. This depends on your release strategy. Your order may need to be approved by someone else in your department. If so, the order will go to the vendor after your approver has released the order. To see the status of your requisition, go to the SAPweb home page, click on Display Requisition, and enter the requisition number.