Look to the revised edition of B51-03 for safety and administration requirements for a variety of equipment including boilers, pressure vessels, fittings and piping, light-weight refillable natural gas cylinders, automotive vehicle compressed natural gas refueling station pressure piping systems and ground storage vessels.

This new edition features:

* Fittings registration processed through a nationally recognized organization
* New requirements for proof of quality control program for multi-plant manufacturers
* Revised proof of quality control program for repair facilities and nameplate information
* Revised change of design, failure to meet test requirements and tests
* New details on the procedure for requalifying all-steel natural gas vehicles storage cylinders