Type of pipe

Class

Grade

C

Si

Mn

P

S

V

Nb

Ti

max

max

max

max

max

max

max

max

WELD

PLS1

L245 B

0.26

-

1.2

-

0.03

0.03

-

-

L290 X42

0.26

-

1.3

-

0.03

0.03

-

-

L320 X46

0.26

-

1.4

-

0.03

0.03

-

-

L360 X52

0.26

-

1.4

-

0.03

0.03

-

-

L390 X56

0.26

-

1.4

-

0.03

0.03

-

-

L415 X60

0.26

-

1.4

-

0.03

0.03

-

-

L450 X65

0.26

-

1.45

-

0.03

0.03

-

-

L485 X70

0.26

-

1.65

-

0.03

0.03

-

-

PLS2

 L245M BM

0.22

0.45

1.2

0.025

0.015

0.05

0.05

0.04

L290M X42M

0.22

0.45

1.3

0.025

0.015

0.05

0.05

0.04

L320M X46M

0.22

0.45

1.3

0.025

0.015

0.05

0.05

0.04

L360M X52M

0.22

0.45

1.4

0.025

0.015

-

-

-

L390M X56M

0.22

0.45

1.4

0.025

0.015

-

-

-

L415M X60M

0.12

0.45

1.6

0.025

0.015

-

-

-

L450M X65M

0.12

0.45

1.6

0.025

0.015

-

-

-

L485M X70M

0.12

0.45

1.7

0.025

0.015

-

-

-

L555M X80M

0.12

0.45

1.85

0.025

0.015

-

-

-

Standard

Class

Grade

Yield strength not less than (MPa)

Tensile strength (MPa)

Elongation(%)

Y.S/T.S

API SPEC 5L ISO 3183

PLS1

L245B

min

245

415

b

-

L290X42

min

290

415

b

-

L320X46

min

320

435

b

-

L360X52

min

360

460

b

-

L390X56

min

390

490

b

-

L415X60

min

415

520

b

-

L450X60

min

450

535

b

-

L485X70

min

485

570

b

-

PLS2

L245N BN

min

245

415

b

-

L245M BM

max

450

760

b

0.93

L290NX42N

min

290

415

b

-

L290MX42M

max

495

760

b

0.93

L320NX46N

min

320

435

b

-

L320MX46M

max

525

760

b

0.93

L360NX52N

min

360

460

b

-

L360MX52M

max

530

760

b

0.93

L390NX56N

min

390

490

b

-

L390MX56M

max

545

760

b

0.93

L415NX60N

min

415

520

b

-

L415MX60M

max

565

760

b

0.93

L450MX65M

min

450

535

b

-

max

600

760

b

0.93

L485MX70M

min

485

570

b

-

max

635

760

b

0.93

L555MX80M

min

555

625

b

-

max

705

825

b

0.93