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The Steel Standard and Grade We Use Often in Steel Pipes and Fittings

May. 21, 2021

1.Welded Steel Pipe:

API SPEC 5L  A25, A25A, B, X42, X46, X52, X56, X60, X65, X70, X80, X90, X100

ASTM A53/ASME SA53 Grade A, Grade B,

ASTM A106/ASME SA106 Grade A, Grade B, Grade C

ASTM A210/ASME SA210 Grade A-1, Grade C

ASTM A500/ASME SA500 Grade A, Grade B, Grade C, Grade D

ASTM A501/ASME SA501 Grade A, Grade B

ASTM A556/ASME SA556 Grade A2, B2, C2

BS 3059 320, 360, 440, 620-460, 629-590, 762

EN 10216-1&2 P195, P235, P265

EN10297-2 E235, E275, E315, E355a, E470, C22E, C35E, C45E

EN10210-1 S235JRH, S275J0H, S275J2H, S355J0H, S355J2H, S355K2H

DIN 1629 st37.0, st44.0, st52.0

DIN 1630 st37.4, st44.4, st52.4

DIN 2391 st35, st45, st52

DIN 17175 st35.8, st45.8

JIS G3429 STH11, STH 12

JIS G3444 STK290, STK400, STK500, STK490, STK540

JIS G3454 STPG370, STPG410

JIS G3455 STS370, STS410, STS480

JIS G3456 STPT370, STPT410, STPT480

JIS G3460 STPL380

JIS G3461 STB340, STB410, STB510

JIS G3464 STBL380

JIS G3475 STKN400W, STKN400B, STKN490B

Steel Pipes

Steel Pipes

2.Seamless Steel Pipe:

Standard: API 5L, API 5CT, ASTM A106/A53, ASTM A519, JIS G 3441, JIS G3444,

JIS G3445 DIN 2391, EN10305, EN10210, ASME SA106, SA192, SA210, SA213, SA335, DIN17175, ASTM A179…

Steel Grade: API 5L :API 5L: GR B, X42, X46, X56, X60, X65, X70

ASTM A53/A106: GR A, GR B, GR C


ASME SA192: ASME SA209 M: T1, T1a

ASTM A335:P1, P2, P5, P9, P11, P22, P23

ASTM A333:Gr.1, Gr.3, Gr.4, Gr.6, Gr.7, Gr.8, Gr.9, Gr.10, Gr.11

3.Seamless Steel Pipe Fittings


ASME: ANSI B16.9,ANSI B16.28,MSS-SP-75

DIN: DIN2605,DIN2615, DIN2616, DIN2617, DIN28011


EN:EN10253-1 EN10253-2


ASME: A234 WPB,A234 WP1,A234 WP5,A234,WP9,

A234 WPB11,A234 WPB12,A234 WPB22,WP91,




DIN: ST37.0,ST35.8,ST45.8,S235JR,P235GH,P265GH,


JIS:JIS G3454,STPG370,TPG410

4.Steel Flange:

Standard ANSI ANSI B16.5 ASME B16.47 series A/B

DIN DIN2576 DIN2527 DIN2623 DON2502 DIN2633

GOST GOST 12820-80/GOST 12821-80/GOST 12822-80/

EN EN1092-1:2002

JIS JIS B2220-2004, KS D3576, KS B6216 KS B1511-2007 JIS B2261; JIS B8210

BS BS4504 BS10 Table D/E

Material ANSI CS A105/SA 105NSS 304/304L, 316/316L Alloy Steel: WHPY45/52/65/80

DIN CS RST37.2;S235JR SS 304/304L,316/316L

GOST CS CT20;16MN;SS 304/304L,316/316L

EN CS RST37.2;S235JR;C22.8SS 304/304L,316/316L

JIS SS400,SF440 SS 304/304L, 316/316L

BS CSRST37.2;S235JR;C22.8;Q235SS 304/304L,316/316L

Pressure ANSI Class 150, 300, 600, 900, 1500 2500lbs

DIN PN6,PN10,PN16,PN25,PN40,PN64,PN100

GOST PN6,PN10,PN16,PN25,PN40,PN64,PN100

EN PN6,PN10,PN16,PN25,PN40,PN64,PN100

JIS 1K,2K,5K,10K,16K,20K,30K,40K

BS PN6,PN10,PN16,PN25,PN40,PN64,PN100

Size ANSI 1/2” – 60”

DIN DN15-DN2000

GOST DN15-DN1600

EN DN15-DN2000

JIS 15A-1500A

BS DN15-DN2000

Coating varnish, yellow paint, anti-rust oil, galvanizing etc

Usage Used for the connection of all kinds of pipeline.

Water works, Shipbuilding industry, Petrochemical & Gas industry, Power industry, Valve industry,and general pipes connecting projects etc. ASME B16.5, ASME B16.47A, ASME B16.47B, MSS SP 44, DIN 2632, DIN2633, DIN2634, DIN2635, DIN2636, JISB2220, BS4504, GB, etc


Carbon steel: A105, A350 LF2, A694 F52, F65, Q235 etc.

Stainless steel: ASTM A182 F304, 304L, 316, 316L, 321, 1Cr18Ni9Ti, 00Cr19Ni10, A182 F51, F53, F55 etc.

5.Forged Pipe Fittings

Pressure 3000LB,6000LB,9000LB

Standard ASME B16.9, ASME B16.28, ASME B16.25, MSS SP 75, DIN 2605, JISB2311  JISB2312   JISB2313, BS, GB, etc

Material carbon steel: A106 GR.B, A234 WPB, A234 WPC, A420 WPL6, 20#, 10#, Q235 etc.

Stainless steel: ASTM A403 WP304, 304L, 316, 316L, 321, 1Cr18Ni9Ti, 00Cr19Ni10 etc.

Alloy steel: ASTM A234 WP12,WP11,WP22,WP5,WP9,WP91,12 Cr1MoV, 10CrMo910,15CrMo, 12Cr2Mo1, ect

6.Stainless Pipe Fittings


Stainless Steel: ASTM A403 WP304, 304L, 310, 316, 316L, 321, 347, 904LDuplex Steel :UNS S31803 S32205 S32750 S32760 etc

Nickely Alloy Steel:N08020 ,601 ,625,4400,800,800h 825 etc

Nickely Alloy Steel: ASTM A234 WP1, WP5, WP9, WP11, WP22, WP91 Low Temperature: ASTM A420 WPL 1, WPL 3, WPL 6

Standard ASME/ANSI B16.9, B16.11, B16.28, JIS B2311, B2312, B2312, B2316, ASTM A403 MSS SP-43, SP-83, SP-97, ANSI, DIN, JIS, BS, ISO, GB, SH, AND HG etc

Thickness Sch5S-Sch160, XS,XXS

Type Stainless steel ,Duplex steel ,Nickely Alloy SR ,LR ,Elbow

Size 1/2"-48"

Surface treatment

Sand Rolling, Sand Blasting ,Acid Cleaning.


Petroleum,chemical,power,gas,metallurgy, shipbuilding, construction, etc


1.Tee (Straight and Reducing) 

2.2.180 DEG Return

3.Elbow (45/90/180 DEG) 


5. Reducer (Concentric and Eccentric)


Seam Or Seamless


45 degree, 90 degree, 180 degree

7.Malleable Pipe Fittings


Malleable Iron

Maximum Pressure 25 BAR (363PSI) (2.5MPA) CLASS 150

Maximum Temperature 200°C (392°F)

Tensile Strength 350MPA

Hardness HB150 (Brinell)

Elongation Rate 10%

Suitable Applications Water, Oil, Gas, Petro-Chemical


EN10242 / ANSI / ASME B16.3 / DIN2950 / IS0 49 / NBR6943 / IS1879 / BS EN10242

Threaded Standard

EN10226 / ASME B.1.20.1 / DIN2999 / ISO7-1 / ISO228 / IS554 / BS EN10226

Work Pressures PN25 / 2.5Mpa / 363PSI /CLASS 150 / 25Bar


Elbow,Tees,Crosses,Bends,Unions,Bushing,Lateral Braches, Sockets,Nipples,Hexagon/Round,Caps,Plugs, Locknuts, Flanges,Side outlet Tees,Side Outlet Elbows and etc

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