Carbon steel pipe

Building upon conventional API thickened tubing, specialized thickened products are primarily developed in two directions:

first, to meet customers 'specific thread processing requirements—such as the integrated joint thread profiles for PH6 types; second, to address the need in oilfields to reuse existing tubing strings by removing damaged thickened threads, while ensuring that the absence of thickened sections does not compromise joint connection strength; additionally, ultra-long thickened ends can satisfy customers' requirements for reusing thickened tubing, thereby reducing costs.

The primary grades or steel grades of these products include:

carbon steel grades—N80-Q/L80-1/T95/P110;

and 13Cr grades—L80-13Cr/CB85-13Cr/CB95-13Cr/CB110-13Cr.

The applicable standards for these products： 

 API 5CT (9th), or customer-specified requirements for special end dimensions.

Key features of these specialized thickened products:

 the tubular section fully complies with API 5CT manufacturing standards, while customers can customize the end dimensions to meet specific thread processing requirements or the needs for repeated service cycles. The thickened ends undergo the same or even stricter quality control procedures as the tubular section—including sampling tests of end performance, magnetic particle inspection, manual ultrasonic testing, and CNC machining of the ends—ensuring that every individual end meets the customer's operational specifications.

Application environments:

these specialized thickened products are suitable for the operating environments specified for all API steel grades, and their thickened ends fully satisfy the same service conditions as the tubular sections.

Product specifications:

Outer diameter: Φ60.3 mm–Φ114.3 mm;

Wall thickness: 4.83 mm–9.65 mm