"Sincerity, Innovation, Rigorousness, and Efficiency" could be the persistent conception of our organization, for that long-term to mutual reciprocity, At present, firm name has carbon steel and Cr Mo Alloy Steel products and gained superior track record and big shares on market place domestic and overseas.
One of the usage of our pipes is fire works, like water transportation for fire work, electric wire protection for fire wrk system and so on.
Please note, ductile iron pipes, copper pipes, alloy pipes, composite pipes, carbon steel pipe, etc. are commonly used for fire-fighting pipes. The size requirements are different from general-purpose pipes and have their own special requirements. Fire-fighting pipes generally need to be painted with red paint or red circle. To distinguish it from other pipelines.
In actual operation, different parts of the fire protection system have different requirements for pipe types and materials, such as: overhead pipes in indoor fire pipes, when the system working pressure is less than or equal to 1.20MPa, hot-dip galvanized steel pipes can be used; When the working pressure is greater than 1.20MPa, hot-dip galvanized thickened steel pipe or hot-dip galvanized seamless steel pipe shall be used; when the system working pressure is greater than 1.60MPa, hot-dip galvanized seamless steel pipe shall be used.
Seamless steel pipe for high temperature operation ASTM A106, suitable for high temperature
Grade of high-quality carbon structural steel: GR.A,GR.B,GR.C
| Composition, ％ | |||
| Grade A | Grade B | Grade C | |
| Carbon, max | 0.25A | 0.3B | 0.35B |
| Manganese | 0.27-0.93 | 0.29-1.06 | 0.29-1.06 |
| Phosphorus, max | 0.035 | 0.035 | 0.035 |
| Sulfur, max | 0.035 | 0.035 | 0.035 |
| Silicon, min | 0.10 | 0.10 | 0.10 |
| Chrome, maxC | 0.40 | 0.40 | 0.40 |
| Copper, maxC | 0.40 | 0.40 | 0.40 |
| Molybdenum, maxC | 0.15 | 0.15 | 0.15 |
| Nickel, maxC | 0.40 | 0.40 | 0.40 |
| Vanadium, maxC | 0.08 | 0.08 | 0.08 |
| A For each reduction of 0.01% below the specified carbon maximum, an increase of 0.06% manganese above the specified maximum will be permitted up to a maximum of 1.35%. | |||
| B Unless otherwise specified by the purchaser, for each reduction of 0.01% below the specified carbon maximum, an increase of 0.06% manganese above the specified maximum will be permitted up to a maximum of 1.65%. | |||
| C These five elements combined shall not exceed 1%. | |||
| Grade A | Grade B | Grade C | ||||||
| Tensile strength, min, psi(MPa) | 48 000(330) | 60 000(415) | 70 000(485) | |||||
| Yield strength, min, psi(MPa) | 30 000(205) | 35 000(240) | 40 000(275) | |||||
| Longitudinal | Transverse | Longitudinal | Transverse | Longitudinal | Transverse | |||
| Elongation in 2 in. (50 mm), min, % Basic minimum elongation transverse strip tests, and for all small sizes tested in full section |
35 | 25 | 30 | 16.5 | 30 | 16.5 | ||
| When standard round 2-in. (50-mm) gauge length test specimen is used | 28 | 20 | 22 | 12 | 20 | 12 | ||
| For longitudinal strip tests | A | A | A | |||||
| For transverse strip tests, a deduction for each 1/32-in. (0.8-mm) decrease in wall thickness below 5/16 in. (7.9 mm) from the basic minimum elongation of the following percentage shall be made | 1.25 | 1.00 | 1.00 | |||||
| A The minimum elongation in 2 in. (50 mm) shall be determined by the following equation: | ||||||||
| e=625000A 0.2 / U 0.9 | ||||||||
| for inch-pound units, and | ||||||||
| e=1940A 0.2 / U 0.9 | ||||||||
| for SI units, | ||||||||
| where: e = minimum elongation in 2 in. (50 mm), %, rounded to the nearest 0.5%, A = cross-sectional area of the tension test specimen, in.2 (mm2), based upon specified outside diameter or nominal specified outside diameter or nominal specimen width and specified wall thickness, rounded to the nearest 0.01 in.2 (1 mm2). (If the area thus calculated is equal to or greater than 0.75 in.2 (500 mm2), then the value 0.75 in.2 (500 mm2) shall be used.), and U = specified tensile strength, psi (MPa). |
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In addition to ensuring chemical composition and mechanical properties, hydrostatic tests are performed one by one, and flaring and flattening tests are performed. . In addition, there are certain requirements for the microstructure, grain size, and decarburization layer of the finished steel pipe.
Supply Ability: 1000 Tons Per Month Per Grade of ASTM SA-106 Steel Pipe
In Bundles And In Strong Wooden Box
7-14 days if in stock, 30-45 days to produce
30% depsoit, 70% L/C or B/L copy or 100% L/C at sight