TOBO STEEL GROUP CHINA
TOBO GROUP TOBO International Trading(Shanghia)Co.,Ltd Tianda Oil Pipe Co., Ltd TOBO Pipeline Equipment Co.,Ltd TPCO & TISCO Pipe(Tianjin)Co.,Ltd.
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API Carbon Steel Pipe A234M WP5, Size 1/2’’~48’’(Seamless)16’’~72’’(Welded)
| Size | 1/2’’~48’’(Seamless); 16’’~72’’(Welded) |
| Wall Thickness | Sch5~SCH XXS |
| Angle | 45,90,180,60,etc according to customer’s requirements. |
| Radius | LR(long radius:R=1.5D);SR(short radius:R=1.0D) |
| Manufacturing Process | Push,Press,Forge,Cast,etc. |
| Standard | ASME/ANSI B16.9, B16.11, B16.28, B16.5; MSS SP-43,83,97; JIS B2311,B2312,B2313,B2316;SB3406,3408,3409,3410; SY/T0510-1998, SY5257-91 |
| Carbon Steel | ASTM A694 F42,F46,F48,F50,F52,F56,F60,F65,F70; ASTM A234 WPB,WPC; ASTM A420 WPL6,WPL3; ASTM A105;ASTM A860 WPHY42,WPHY52,WPHY60,WPHY65,WPHY70; ASTM A350 LF1,LF2,LF3; ASTM A266 GR.1,GR.2,GR.3,GR.4 |
| Stainless Steel | ASTM / ASME A/SA 182 F 304, 304L, 304H, 309S, 309H, 310S, 310H,316, 316TI,316H, 316L,316LN, 317, 317L, 321, 321H, 347, 347H,348,348H,F40/S31254,F20/N08020, F45/S30815,F46/S30600,F47/S31725,F48/S31726,F49/S34565, F56/S33228, F58/S31266,F62/N08367/1.4529 |
| Alloy Steel | ASTM/ ASME S/A234/ A 234M WP5,WP9,WP11,WP12,WP22, WP9; ASTM/ ASME S/A182/ A 182M F5, F5a , F9, F11, F12, F22, F91; ASTM/ ASME S/A336/ A 336M F5, F9, F11, F12, F22, F91. |
| Duplex&Super Duplex Stainless Steel | ASTM / ASME A/SA 182 F51/2205/S31803/1.4462;F53/2507/S32750/1.4410;F55/S32760, F50/S31200;F57/S39277;F59/S32520;F60/S32205;F61/S32250; F904L/N08904/1.4539;F44/254SMO/S31254/1.4574;S31050/1.4466; 17-4PH/S17400/1.4548;724L;316Lmod/1.4435;725LN/310MoLN |
| Special Alloy | Inconel 600,Inconel 625,Inconel 718,Inconel X-750,Incoloy800,Incoloy 800H,Incoloy825,Hastelloy C276,Monel 400, Monel K-500 |
Standards: ASTM/ASME A789/SA789, A790/SA790,A450,A530
Material: UNS S31803(Cr22Ni5Mo3/1.4462)/2205,UNS S32750(1.4410),UNS S31500(Cr18NiMo3Si2),
UNS32760(1.4501)
Chemical Composition
| Grade | C max | Si max | Mn max | P max | S max | Cr | Ni | Mo | N |
| UNS S32750 | 0.030 | 0.8 | 1.2 | 0.030 | 0.015 | 24.0-26.0 | 6.0-8.0 | 3.0-5.0 | 0.24-0.32 |
| UNS S31803 | 0.030 | 1.0 | 2.0 | 0.020 | 0.020 | 21.0-23.0 | 4.5-6.5 | 2.5-3.5 | 0.08-0.20 |
| UNS S31500 | 0.030 | 1.0 | 1.2-2.0 | 0.030 | 0.030 | 18.0-19.0 | 4.5-5.5 | 2.5-3.5 | 0.05-0.10 |
Physical Properties
| Grade | Y.S.MPa min | T.S.Mpa min | Elongation % | Hardness HRC |
| UNS S32750 | 550 | 800 | 15 | 20 |
| UNS S31803 | 450 | 620 | 25 | 20 |
| UNS S31500 | 440 | 630 | 30 | 20 |
Duplex Stainless Steel Pipe Application:
Chemical processing, Transport and Storage.
Oil and gas exploration and offshore rigs.
Oil and gas refining.
Marine environments.
Pollution control equipment.
Pulp and paper manufacturing
Chemical process Plant
Some of the quality tests carried out by us includes:
| Corrosion Test | Conducted only when specially requested by the client |
| Chemical Analysis | Test done as per required quality standards |
| Destructive / Mechanical Testing | Tensile | Hardness | Flattening | Flare | Flange |
| Reverse-bend and Re. flat tests | Carried out in full compliance with relevant standards & ASTM A-450 and A-530 norms, which ensures trouble-free expansion, welding & use at customers end |
| Eddy Current Testing | Done to detect homogeneities in subsurface by using Digital Flaw-mark Testing System |
| Hydrostatic Testing | 100% Hydrostatic Testing carried out according to ASTM-A 450 norms for checking tube leakage, and biggest pressure we can support 20Mpa/7s . |
| Air Under Pressure Test | To check any evidence of air leakage |
| Visual Inspection | After passivation, every single length of tubes & pipes is subjected to thorough visual inspection by trained staff for detecting surface flaws & other imperfections |
Supplementary Testing : Apart from the above mentioned tests, we also carry out on the manufactured products supplementary testing. The tests conducted under this include:
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