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Home » J55 vs K55 Casing Pipe
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J55 vs K55 Casing Pipe

J55 vs K55 Casing Pipe
December 11, 2020
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1. Heat treatment
PSL1: J55 and K55 are the same (rollable delivery);
PSL2: J55, K55 products should be the whole normalizing or normalizing and tempering, if thickened, should be thickened after normalizing or normalizing and tempering.

2. Straightening (no difference)

3. Chemical composition (control no difference)

4. Tensile test
J55: Yield strength is 379MPA~552MPA; tensile strength is 517MPA;
K55: Yield strength is 379MPA~552MPA; tensile strength is 655MPA;
Due to the difference in tensile strength, the required minimum elongation J55 is 19% and K55 is 15%.

5. Impact test
Body pipe:
PSL1: No difference between J55 and K55;
PSL2: J55 and K55 require a horizontal minimum impact energy of 20 J for a full-size specimen and 27 J for a full-size specimen.
Couplings: The J55 and K55 impact tests must be performed with a minimum transverse impact energy of 20 J for size specimens and 27 J for full-size specimens in the longitudinal direction.

6. Hydraulic pressure test (no difference)

7. Wall thickness detection
PSL1: No measurement coverage requirements for wall thicknesses of J55 and K55;
PSL2: For wall thickness measurement and recording of J55 and K55 for full length, the surface area covered by the automatic detection system should preferably reach 25%.

8. Non-destructive testing
PSL1: No mandatory requirements for non-destructive testing of grades J55 and K55;
PSL2: All steel grades of grades J55 and K55 shall be tested using one or more of the methods specified in the standard to find that the outer and inner surfaces of the steel tube may receive the longitudinal imperfections of the horizontal L4.

9. Logo
A bright green belt is sprayed on the J55 casing pipe, the collar is painted bright green, and a white belt is added;
Two bright green belts are sprayed on the K55 steel tube, and the collar is painted bright green with no additional ribbon.

https://www.permanentsteel.com/productshow/casing-pipe.html
Submit your logistics, material handling, or supply chain related company news in Supply Chain Quarterly's's Industry Press Room section or New Products section
Manufacturing Oil Technology
KEYWORDS Permanent Steel Manufacturing Co.,Ltd
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