After the production of the
casing pipe and the pipeline, the surface is generally sprayed with anti-rust paint, and the outer surface of the pipe is sprayed with a prominent logo according to the API standard requirements, indicating the manufacturer of the product, the ISO certificate number of the manufacturer, API logo, API Certificate number, nominal diameter, nominal weight, steel grade, length, forming method, hydraulic pressure, furnace number, batch number, tube number and identification of special requirements of customers, such as shipping marks. The thread of the oil casing shall be protected by special thread anti-rust grease.
Each pipe must be capped with steel and plastic at both ends to protect the wire buckle or chamfer.
For petroleum special pipes are usually packed in steel bands, and the weight of each bundle is preferably not more than 2.5 tons, which is convenient for loading and unloading. A waterproof label is usually attached to each bundle, indicating the manufacturer, product specifications, quantity and remarks.
