Different standard in steel pipe-part 2

In the last article,we learned some standards of the steel pipe.All these requirements can be met by selecting a pipe made to an appropriate standard e.g. ASTM or API Standard.

API 5L : Line Pipe

In the oil and natural gas industries, steel pipe used to convey oil and gas is manufactured to the American Petroleum Institute’s standard API 5L, which applies tighter control of composition and more testing than ASTM-120. Available Grades are :

1. Grade A and B SMLS,
2. Grade A and B ERW,
3. Grade FBW

API 5L PSL2 steel pipes

ASTM A312 Stainless Steel

This is a seamless, straight-seam welded, and heavily cold worked welded austenitic stainless steel pipe intended for high-temperature and general corrosive service. Chromium content ranges from 15 to 26 Percent.

Available Stainless Steel Grades are: ASTM A312 TP304, 304H, 304L, 310, 316, 316H, 316L, 317, 321L, 321, 321H, 347, 347H.

1. For Cryogenic Temperatures upto -100 deg. C : 304, 304L, 316, 316L, 327H and 347
2. For Elevated Temperatures below 630 deg. C : 304H, 316H, 327H and 312

ASTM A333 : LTCS

This is a low temperature carbon steel material used for operating temperatures in range of -15 deg C to -100 deg. C. Both seamless and welded steel pipes are available. These pipes require Impact Testing.  Grade 1 and Grade 3 are mostly used. No filler metal is used in welding operation. All pipes shall be heat treated to control their microstructure.

ASTM A335 P91 seamless steel pipes ASME SA335 P91 alloy steel pipes

ASTM A335 : Alloy Steel

This is a seamless ferritic alloy steel pipe intended for elevated temperature service, more than 415 deg.C and upto 600 deg.C.

Pipe ordered to this specification shall be suitable for bending, flanging (vanstoning), and similar forming operations, and for fusion welding. These are seamless pipe only.

Available Grades are : P1,P2,P5,P5B, P5C,P9,P11,P12,P15,P21,P22,P23,P91,P122,P911

They have higher chromium and molybdenum content than A106.

Grades P1, P11, P12 and P22 Used for Elevated Temperatures, above 427 deg. C upto 630 deg. C.

1. P11 : Max 595 deg. C.
2. P21 and P22 : Max 650 deg. C .
3. P1 : 415 to 470 deg. C.
4. P11 and P12 : 470 to 540 dg. C (P11 has higher chromial content hence more corrosion resistance than P12. Normally they are used interchangeably based on availability)
5. P22 : 540 to 600 deg. C
6. A312 TP 304H, 316H, 312 and 347H used above 600 deg. up to 815 deg. C

As a professional steel pipe supplier,we supply steel pipes in different specifications,standards,materials.If you want to know more about our products,please feel free to contact us.Email:sales@haihaogroup.com