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Help CenterJIS G3461 STB340 Carbon Steel Tubes for Boiler and Heat Exchanger
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JIS G3461 Carbon Steel Tubes for Boiler and Heat Exchanger |
1. Scope |
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This Japanese Industrial Standard specifies the carbon steel tubes, hereinafter referred to as the "tubes", used for exchanging heat on the inside and outside of the tube, such as water tubes, smoke tubes, superheater tubes, air preheater tubes, etc. of the boiler, and heat exchanger tubes, condenser tubes, catalyzer tubes, etc. used in chemical and petroleum industries. |
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However, it is not applicable to the steel tubes for heating furnace and steel heat exchanger tubes for low temperature service. Remarks |
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1. The purchaser may designate in addition to the items specified in this text, by prior agreement with the manufacturer, part or all of the items in the supplementary quality requirements Z1, Z2, Z3 and Z4 specified in Appendix 1 and the item of the U-bend tube specified in Appendix 2. 2. The units and numerical values given in { } in this Standard are based on the International System of Units (SI) and are appended for informative reference. Further, the traditional units accompanied by numerical values in this Standard shall be converted to the SI units and numerical values on Jan. 1, 1991. |
2. Classes and Symbols |
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The tube shall be classified into 3 grades and their class symbols shall be as given in Table 1. Table 1 Class Symbols (Applicable till the end of 1990) |
| Symbol of class | Traditional symbol | C | Si | Mn | P | S |
| STB 340 | STB 35 | 0.18 max | 0.35 max | 0.30 to 0.60 | 0.035 max | 0.035 max |
| Symbol of class | Tensile strength N/mm2 | Yield point or proof stress N/mm2 | Elongation % | ||
| Outside diameter under 10 mm | Outer diameter 10 mm or over to and excl. 20 mm | Outer diameter 20mm or over | |||
| No. 11 test piece | No. 11 test piece | No. 11 test piece No. 12 test piece | |||
| STB 340 | 340 min | 175 min | 27 min | 30 min | 35 min |
| Symbol of class | Rockwell hardness HRB (Mean value of three points) |
| STB 340 | 77 max |
LIAOCHENG KUNCHENG PIPE CO.,LTD
Room A2709 ChuangYe Building,Liaocheng City, Shandong Province, China
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Tel&Fax:0086-0635-2930669
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PRODUCTS MENU:
Honed Tube : JIS STKM13C, DIN ST52, SAE1020 ,DIN CK45 etc.
Alloy Seamless Tube: ASME SA-335 (P5, P9, P11, P22 P91) A213 -T22/T12 etc.
Hollow seamless bar :AISI 4130 ,ASTM 4140 etc.
Carbon steel pipe :ASTM A106 Gr.B
Stainless steel pipe : 304, 316, 316L & H grades etc.
Hollow section :S235JR, S275JR, S355JR, P265GH, P355N
SERVICES MENU:
Machining:Turning , Threading , Milling , Boring , Grooving , Skiving , Trepanning , Sawing , Straightening , honing etc
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