Group OIST can supply a full range of pipes, fittings, flanges and valves in carbon steel, alloy steel, stainless steel and duplex / superduplex. ASTM/ASME and EN Standards.

CARBON STEEL

PIPES

 

SPECIFICATION GRADES
ASTM/ASME A/SA 106 Grade B, C
ASTM/ASME A/SA 53 Grade A, B
API 5L Gr. B, X42, X52, X55, X60, X65, X70, X80
ASTM/ASME A/SA 671/672 Grade 60, 65, 70
EN 10216-2 Seamless P235GH – P265GH
EN 10217-5 Welded P235GH – P265GH

 

FITTINGS AND FLANGES

 

PRODUCT SPECIFICATION GRADES
BUTT-WELD FITTINGS ASTM/ASME A/SA A234 WPB, WPC
ASTM A860 / MSS SP 75 WPHY42 – WPHY80
EN 10253-2 Type A/B P235GH – P265GH
FLANGES ASTM/ASME  A/SA 105 A105
ASTM A694 / MSS SP 44 F42, F52, F60, F65, F70
AWWA C207 Class 1
EN 1092-1 P235TR2 – P256GH
PRESSURE FITTINGS ASTM/ASME A/SA 105
MSS SP-97, MSS-SP-95 WPB
ASTM/ASME A/SA106 Grade A, C
LOW AND MODERATE TEMPERATURE CARBON STEEL

PIPES

 

SPECIFICATION GRADES
ASTM/ASME  A/SA 333 Grade 1, 3, 6
EN 10216-3 P215NL, P355NH, P275NL

 

FITTINGS AND FLANGES

 

PRODUCT SPECIFICATION GRADES
BUTT-WELD FITTINGS ASTM /ASME A/SA 420 WPL1, WPL3, WPL6
EN 10253-2 Type A/B P215NL, P355NH, P275NL
FLANGES ASTM/ASME A/SA 350 LF2, LF3
EN 1092-1 P285NH – P355QH
PRESSURE FITTINGS ASTM/ASME A/SA 350 LF2
MSS SP-97, MSS-SP-95 A/SA420 WPL1, 3, 6
ASTM/ASME A/SA 333 Grade 1, 3, 6
ALLOY STEEL

PIPES

 

SPECIFICATION GRADES
ASTM/ASME  A/SA 335 P1, P5, P9, P11, P22, P91, P92
ASTM/ASME  A/SA 691 1-1/4CR, 2-1/4CR, 5CR, 9CR, 91
EN 10216-2 Seamless 16Mo3, 13CrMo4-5, 10CrMo9-10, 11CrMo9-11, X10CrMoVnb9-1, X10CrWMoVnb9-2
EN 10217-5 Welded 16Mo3, 13CrMo4-5, 10CrMo9-10, 11CrMo9-11, X10CrMoVnb9-1, X10CrWMoVnb9-2

 

FITTINGS AND FLANGES

 

PRODUCT SPECIFICATION GRADES
BUTT-WELD FITTINGS ASTM/ASME A/SA 234 WP5, WP9, WP11, WP22, WP91, WP92
EN 10253-2 Type A/B 16Mo3, 13CrMo4-5, 10CrMo9-10, 11CrMo9-11, X10CrMoVnb9-1, X10CrWMoVnb9-2
FLANGES ASTM/ASTME A/SA 182 F5, F9, F11, F22, F91, F92
EN 1092-1 16Mo3, 13CrMo4-5, 10CrMo9-10, 11CrMo9-11, X10CrMoVnb9-1, X10CrWMoVnb9-2
PRESSURE FITTINGS ASTM/ASME A/SA 182 F5, F9, F11, F22, F91, F92
MSS SP-97, MSS-SP-95 WP5, WP9, WP11, WP22, WP91, WP92
ASTM/ASME A/SA 335 P5, P9, P11, P22, P91, P92
STAINLESS STEEL

PIPES

 

ASTM A312 / 358 TP UNS EN 10216-2 SEAMLESS
EN 10217-5 WELDED
304 S30400 X5CrNi18-10
304L S30403 X2CrNi19-11
304H S30409 X6CrNi18-11
310 S31000 X15CrNiSi25-21
310S S31008 X8CrNi25-21
316 S31600 X5CrNiMo17-12-2
316L S31603 X2CrNiMo17-2-2
316H S31609 X8CrNiMo17-12-2
316Ti S31635 X6CrNiMo17-12-2
321 S32100 X6CrNiTi18-10
321H S32109 X8CrNiTi18-10
347 S34700 X6CrNiNb18-10
347H S34709 X8CrNiNb16-13
904L N08904 X1NiCrMoCu25-20-5

 

FITTINGS AND FLANGES

 

ASTM/ASME A/SA 403WP (Butt-Weld Fittings)
ASTM/ASME A/SA 182F (Flanges)		 UNS EN 10253-4 Type A/B (Butt-Weld Fittings)
EN 1092-1 (Flanges)
304 S30400 X5CrNi18-10
304L S30403 X2CrNi19-11
304H S30409 X6CrNi18-11
310 S31000 X15CrNiSi25-21
310S S31008 X8CrNi25-21
316 S31600 X5CrNiMo17-12-2
316L S31603 X2CrNiMo17-2-2
316H S31609 X8CrNiMo17-12-2
316Ti S31635 X6CrNiMo17-12-2
321 S32100 X6CrNiTi18-10
321H S32109 X8CrNiTi18-10
347 S34700 X6CrNiNb18-10
347H S34709 X8CrNiNb16-13
904L N08904 X1NiCrMoCu25-20-5
DUPLEX AND SUPERDUPLEX

PIPES

 

ASTM A790/928 UNS EN 10216-2 SEAMLESS
EN 10217-5 WELDED
S32160 X2CrNiMoN25-7-4
S32900 X3CrNiMoN27-5-2
S31803/S32205 X2CrNiMoN22-5-3
S32760 X2CrNiMOCuWN25-7-4
S32750/S32550 X2CrNiMoCuN25-6-3

 

BUTT-WELD FITTINGS

 

ASTM A815 UNS EN 10253-4 Type A/B
S32160 X2CrNiMoN25-7-4
S32900 X3CrNiMoN27-5-2
S31803/S32205 X2CrNiMoN22-5-3
S32760 X2CrNiMOCuWN25-7-4
S32750/S32550 X2CrNiMoCuN25-6-3

 

FLANGES AND PRESSURE FITTINGS

 

PRODUCT SPECIFICATION GRADES
FLANGES ASTM/ASTME A/SA 182 F35, F51, F55, F60
EN 1092-1 X2CrNiMoN25-7-4, X3CrNiMoN27-5-2, X2CrNiMoN22-5-3, X2CrNiMOCuWN25-7-4, X2CrNiMoCuN25-6-3
VALVES

 

  • Ball Valves.
  • Globe, gate and check valves.
  • Butterfly valves.
  • Plug valves.
  • Needle valves.