How many oil and gas pipeline units are there in Langfang?

It's the same unit. Langfang has many subordinate units of the Pipeline Bureau.

Langfang International Hotel, Pipeline Engineering Co., Ltd., Pipeline Company I, II, III and IV, Pipeline Research Institute, Longwei Supervision Company, Pipeline Construction Company, Anticorrosion Company, Crossing Company, City Gas Company, Pipeline Special Transportation Company, Pipeline Equipment Company, Maintenance Company, Property Company, Bureau Hospital, Vocational Education Center, Ocean Company, News Center, Cinema, Longhui, Real Estate Company, Telecom and so on.

And the transportation company, China Oil Pipeline Company.

Pipeline Bureau and pipeline company used to be a unit.

Later, they separated.