Frequently Asked Questions

Q: Where can I get the UPS shipment tracking info for my order? 
A: A UPS tracking number is located on your invoice.  To track your shipment, please visit the UPS tracking webpage and enter your tracking number.

Q: Why does Oseco require a lead-time for my order?
A: At Oseco, we provide custom solutions for our customers. We build every lot of parts to suit customers’ special needs as specified on each purchase order.  We perform extensive testing on every order to ensure quality and reliability of our products, which takes time. We do offer expediting options for emergency orders.  

Q: Why aren't the products I ordered in stock and ready to ship today?
A: At Oseco, we custom build your order to meet the specifications on your purchase order.  We do have some select items that have an associated stocking program. See our Explosion Vent Stocking Program. We also have an online store where you can order Railcar Discs and Extruder Burst Plugs. 

Q: How do I submit my purchase order to Oseco?
A: Purchase orders should be emailed to

 Please address your purchase order to:

PO Box 504834
St. Louis, MO 63150-4834

Orders cannot be processed unless they are correctly addressed.

Q: How do I know if my purchase order was received?
A: Orders emailed to will receive an automated response indicating your email/inquiry was received.

Q: How do I know when my order has been processed?
A: Once your order has been processed, you will receive an order acknowledgment via email.

Q: How do I choose a rupture disc for my application?
A: Our online disc selector and our selection guide are great tools to narrow down your product options.  If you need additional information, please fill out our online request a quote form and an Oseco representative will contact you.  

Q: I can't find what I need in the disc selection guide.  Who do I contact for more product info?
A: To request additional product information, please fill out our online request a quote form and an Oseco representative will contact you.  

Q: Where can I find information on Oseco's newest products and services?
A; For the information on new products, services or events, please visit the News section of

Q: Do you have to have an excess flow valve on the tell tale indicator assembly when you install a rupture disc under a safety relief valve?
A:  No.  ASME only requires you to have the tell tale assembly or pressure switch to monitor the pressure between the disc and safety relief valve. The excess flow valve is to vent very low pressure away from the disc since it's a differential pressure device.