Pipe for mechanical engineering

Pipes used for petroleum mechanical processing are the necessary materials for oil exploration equipment, well-drilling equipment, machinery oil recovery equipment, facilities and accessories for oil drilling & recovery as well as integrated equipment of petroleum & natural gas collection and transmission.

Our manufactory has successfully developed petroleum mechanical processing pipe with steel grade 55ksi-135ksi on its own, which has both good strength and good tenacity, uniform performance of whole wall thickness and excellent processing performance.

Production Range

• OD: 42mm-760mm
• WT: 4mm-120mm

Steel Grade and Properties

Applicable specification: API 5CT, ASTM A519, NACE MR0175, GB/T 8162 or user’s agreement.

Properties of Steel Pipe
Steel grade	Yield	Tensile	Elongation	Hardness	Absorbed-energy
	（MPa）	（Mpa）	（%）	(HRC)	(AKV2/J)
55ksi	379-552	≥ 655	≥16	—	Implement  in accordance with API 5CT Specification
80ksi	552-655	≥ 655	≥ 16	≤ 23.0HRC
95ksi	655-758	≥ 724	≥ 15	≤ 25.4HRC
110ksi	758-965	≥ 862	≥ 13	28-34 HRC
125ksi	862-1034	≥ 931	≥ 12	28-36 HRC
135ksi	931-1068	≥ 931	≥ 12	28-38 HRC

Remarks:

• Property requirements for steel grade of 4130, 4140, 42CrMo shall be negotiated by both parties.
• Supply steel pipe with the relevant properties required by the clients.

Note: Steel pipe can be developed and produced to meet the users’ personalized requirements according to their demands.

Application Fields

Petroleum mechanical processing pipe can be applied to machining accessories for well drilling and well completion tools, power drilling tools used under the well，suspension sealing & isolation systems，wellhead system devices and other oil-field service products.

NACE MR0175, is titled Petroleum and natural gas industries — Materials for use in H2S-containing environments in oil and gas production. It was issued as a recommendation of threshold limits of H2S above which precautions against environmental cracking are considered necessary.