Drill pipe is in accordance with API SPEC 5D, it can be divided into two groups:

• Group 1- Grade E drill pipe
• Group 3- All high strength grades of drill pipe.(Grades X-95, G-105, S-135)

Note: A the minimum elongation in 2 in.(50.8mm) shall be that determined by the following formula:

• e=625,000A0.2/U0.9
• where e = minimum elongation in 2 in (50.8 mm) in percent rounded to nearest 0.5%.
• A = cross-sectional area of the tensile test specimen in square inches, based on specified outside diameter, or nominal specimen width, and specified wall thickness rounded to the nearest 0.01 in.2, or 0.75 in.2, whichever is smaller.
• U = specified tensile strength, psi.

Note:

See Table 5 in API SPEC 5D for minimum elongation values for various size strip tensile specimens and grades. The minimum elongation for either round bar tensile specimen (0.350-in. diameter with 1.4 -in, gauge length and the 0.500-in. diameter with 2.00-in. gauge length) shall be that shown in Table 5 for a cross-sectional area "A" of 0.20 in.2.

Source :- http://www.rigmanufacturer.com/drill-pipe.html

RM Holding BV

RigManufacturer manufactures and refurbishes oil field equipment for companies all over the world including the US, Norway, UAE and much more. We are one of the biggest suppliers of oil field equipment in de world. The company was established in 1985 by Kian Kianersi and focused on buying and selling used equipment and machinery. We have sold equipment in diverse branches such as the Plastic-, Textile, Chemical- and the Petrochemical industry. It wasn’t until 1996 that Kian Kianersi decided to go into drilling. Later on, he started a consolatory service, giving advice to small drilling companies all around the world.