| After-sales Service: | Full Follow-up Service |
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| Warranty: | 1 Years |
| Type: | Concentric |
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| Brand Name | TOBO/Metal | |
| Product Name | Reducer | |
| Certification | SGS/BV/ABS/LR/TUV/DNV/BIS/API/PED | |
| Place of Origin | Shanghai China (Mainland) | |
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Material
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ASTM | Carbon steel(ASTM A234WPB,,A234WPC,A420WPL6. |
| Stainless steel(ASTM A403 WP304,304L,316,316L,321. 1Cr18Ni9Ti, 00Cr19Ni10, 00Cr17Ni14Mo2, ect.) | ||
| Alloy Steel:A234WP12,A234WP11,A234WP22,A234WP5, A420WPL6,A420WPL3 | ||
| DIN | Carbon steel:St37.0,St35.8,St45.8 | |
| Stainless steel:1.4301,1.4306,1.4401,1.4571 | ||
| Alloy steel:1.7335,1.7380,1.0488(1.0566) | ||
| JIS | Carbon steel:PG370,PT410 | |
| Stainless steel:SUS304,SUS304L,SUS316,SUS316L,SUS321 | ||
| Alloy steel:PA22,PA23,PA24,PA25,PL380 | ||
| GB | 10#,20#,20G,23g,20R,Q235,16Mn, 16MnR,1Cr5Mo, 12CrMo, 12CrMoG, 12Cr1Mo | |
| Standard Specification | ASTM,JIS,BS,DIN,UNI etc. | |
| Connection | Welding | |
| Shape | Equal | |
| Technics | Forged | |
| Qualification | ISO9001, API,CE | |
| Equipment | Pushing Machine,Beveling Machine,Sand Blasting Machine | |
| Thickness | Sch10-Sch160 XXS | |
| Size | Seamless 1/2" To 24" Welded 24" To 72" | |
| Surface of Finish | Antirust Oil,Hot Galvanized | |
| Pressure | Sch5--Sch160,XXS | |
| Standard | ASME,ANSI B16.9; DIN2605,2615,2616,2617,JIS B2311 ,2312,2313; EN 10253-1 ,EN 10253-2 | |
| The third party inspection | BV, SGS, LOIYD, TUV, and other party alloyed by clients. | |
| Remark | Also can supply IBR fittings and Specialized NACE & HIC Fittings | |
| Marking | Registered logo,Heat Number,Steel Grade,Standard,Size | |
| Minimum Order Quantity | 1pcs | |
| Supply Ability | 3,0000pcs per month | |
| Price | Depending on quantity | |
| Payment Terms | T/T or Western Union or LC | |
| Delivery Time | 10-50 days depending on quantity | |
| Packing | PLY-wooden case or pallet or as for clients' requirements | |
| Application | Petroleum, chemical, machinery, electric power, shipbuilding, papermaking, | |
| Advantages | 1. 20 + years of production experience at your service. 2. The fastest delivery 3. The lowest price 4. Most comprehensive standards and materials for your choice. 5. 100% export. 6. Our products EXPORT to Africa, Oceania, mid east, eastern Asia, Western Europe etc. |
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| Parameter Category | Specific Parameter | Parameter Range |
| Dimension Parameters | Large - end Diameter and Small - end Diameter | Common specifications: 3/4"×1/2" (DN20×15), 1"×3/4" (DN25×20), 1 1/2"×1" (DN40×25) ......48"×40" (DN1200×1000), etc. |
| Wall Thickness | sch.5s (approx. 1.65mm - 2.11mm, depending on pipe diameter), sch.10s (approx. 2.11mm - 2.77mm), sch.20 (approx. 2.77mm - 3.40mm), sch.30 (approx. 3.40mm - 4.0mm), sch.40s (approx. 3.91mm - 4.55mm), std (approx. 3.91mm - 4.55mm, partially overlapping sch.40s), sch.60 (approx. 5.54mm - 6.35mm), sch.80 (approx. 6.35mm - 7.11mm), xs (approx. 6.35mm - 7.11mm, partially overlapping sch.80), sch.100 (approx. 7.82mm - 8.74mm), sch.120 (approx. 9.53mm - 10.97mm), sch.140 (approx. 11.13mm - 12.7mm), sch.160 (approx. 12.7mm - 14.27mm), xxs (approx. 12.7mm - 14.27mm, partially coinciding with sch.160) | |
| Length | Small sizes (e.g. DN20 - DN50): 50mm - 80mm; Medium sizes (DN65 - DN200): 80mm - 200mm; Large sizes (DN250 - DN1200): 200mm - 500mm | |
| Eccentricity (for Eccentric Reducers) | Small size (DN20 - DN50): 5mm - 10mm; Medium size (DN65 - DN200): 10mm - 20mm; Large size (DN250 - DN1200): 20mm - 50mm | |
| Material Parameters | Alloy Element Content | 304: chromium 17% - 19%, nickel 8% - 10.5% 316L: chromium 16% - 18%, nickel 10% - 14%, molybdenum 2% - 3% |
| Hardness | 304: annealed state HB ≤ 187, HRB ≤ 90, HV ≤ 200 316L: annealed state HB ≤ 187, HRB ≤ 90, HV ≤ 200 (hardness increase after work hardening) |
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| Corrosion Resistance | In Cl-containing solutions, 304 corrodes at a rate of about 0.1mm/year - 0.5mm/year; 316L corrodes at a rate of about 0.01mm/year - 0.1mm/year (depending on solution concentration, temperature, etc.). | |
| Process Parameters | Reducing/Expanding Parameters | Pressing force: small specifications (DN20 - DN50) 50 tons - 100 tons; medium specifications (DN65 - DN200) 100 tons - 300 tons; large specifications (DN250 - DN1200) 300 tons - 800 tons Pressing speed: small specifications 2mm/min - 5mm/min; medium specifications 5mm/min - 10mm/min; large specifications 10mm/ min - 20mm/min. min - 20mm/min mold size and shape: customized according to the pipe diameter, such as DN50 size head mold inner diameter suitable for 57mm (OD 57mm pipe common specifications), and designed to correspond to the shape of the reduction or expansion of diameter |
| Stamping Parameters | Stamping pressure: small specifications (DN20 - DN50) 200kN - 500kN; medium specifications (DN65 - DN200) 500kN - 1500kN; large specifications (DN250 - DN1200) 1500kN - 5000kN Stamping speed: small specifications 3mm/s - 8mm/s; in the specifications of 8mm/s - 15mm/s; large specifications 15mm/s - 30mm/s stamping die shape and size: adaptable products, such as DN100 size head die stamping surface according to 108mm (OD 108mm pipe common specifications) design | |
| Welding Parameters | Welding current: manual arc welding, small specifications (DN20 - DN50) 80A - 120A; medium specifications (DN65 - DN200) 120A - 200A; large specifications (DN250 - DN1200) 200A - 350A Voltage: manual arc welding, 20V - 30V Welding speed: small specifications 100mm/min - 150mm/min; medium specifications 150mm/min - 250mm/min; large specifications 250mm/min - 400mm/min Welding angle: butt welding 30° - 45° (V-beveling) Specification 150mm/min - 250mm/min; large specifications 250mm/min - 400mm/min Welding Angle: Butt welding 30° - 45° (V-bevel) | |
| Heat Treatment Parameters | Solid solution treatment temperature: 304 stainless steel 1050 ºC - 1100 ºC; 316L stainless steel 1020 ºC - 1100 ºC Holding time: small specifications (DN20 - DN50) 30min - 60min; in the specifications (DN65 - DN200) 60min - 120min; large specifications (DN250 - DN1200) 120min - 240min Cooling method: air-cooled (cooling speed of about 5 ºC / s - 15 ºC / s, water-cooled (cooling speed of about 50 ºC / s - 150 ºC / s) 240min cooling mode: air-cooled (cooling speed of about 5 ºC / s - 15 ºC / s), water-cooled (cooling speed of about 50 ºC / s - 150 ºC / s) | |
| Performance Parameters | Pressure Rating | sch5s: approx. 1.0MPa - 2.0MPa; sch10s: approx. 2.0MPa - 3.0MPa; std: approx. 3.0MPa - 4.0MPa; xs: approx. 4.0MPa - 6.0MPa (depending on the diameter of the pipe, material changes) |
| Strength | 304 stainless steel tensile strength ≥520MPa, yield strength ≥205MPa 316L stainless steel tensile strength ≥485MPa, yield strength ≥170MPa |
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| Sealing Performance | According to GB/T 13927 standard, under 1.5 times the design pressure, keep pressure for 30min without leakage. | |
| Tolerance Parameters | Diameter Tolerance | Outside diameter: small specifications (DN20 - DN50) ± 0.5%; in the specifications (DN65 - DN200) ± 0.8%; large specifications (DN250 - DN1200) ± 1% inside diameter: small specifications (DN20 - DN50) ± 0.3mm; in the specifications (DN65 - DN200) ± 0.5mm; large specifications (DN250 - DN1200) ± 1mm |
| Wall Thickness Tolerance | ±10% of nominal wall thickness, e.g. sch.40s wall thickness 4.0mm, tolerance range 3.6mm - 4.4mm | |
| Length Tolerance | Small sizes (DN20 - DN50) ±2mm; medium sizes (DN65 - DN200) ±3mm; large sizes (DN250 - DN1200) ±5mm (longer sizes can be relaxed to ±10mm) | |
| Concentricity and Eccentricity Tolerance | Concentricity: small specifications (DN20 - DN50) ± 0.5mm; medium specifications (DN65 - DN200) ± 0.8mm; large specifications (DN250 - DN1200) ± 1mm eccentricity: small specifications (DN20 - DN50) ± 1mm; medium specifications (DN65 - DN200) ± 2mm; large specifications (DN250 - DN1200) ± 3mm 3mm | |
| Surface Quality Parameters | Surface Roughness | Inner surface: Ra≤6.3μm for general industrial use; Ra≤0.8μm - 1.6μm for hygienic use in food, medicine, etc. Outer surface: Ra≤12.5μm. |
| Appearance Defects | No cracks, heavy skin, pores, slag, etc., scratches, pit depth does not exceed the negative deviation of the wall thickness, such as wall thickness of 4.0mm, the negative deviation of 0.4mm, scratches, pit depth ≤ 0.4mm | |
| Machining Allowance Parameters | Cutting Allowance | Single side: small size (DN20 - DN50) 2mm - 3mm; medium size (DN65 - DN200) 3mm - 4mm; large size (DN250 - DN1200) 4mm - 5mm |
| Machining Allowance | Small size (DN20 - DN50) 3mm - 5mm; Medium size (DN65 - DN200) 5mm - 6mm; Large size (DN250 - DN1200) 6mm - 8mm |
TOBO INDUSTRY (SHANGHAI) CO., LTD Located in Baolong Center, Jiading District, Shanghai, the company has 5 factories to provide customers with the products they need, and the group factory covers an area of 800 acres As a Top 10 in the field of pipe flange manufacturing, the company has been committed to providing high-quality pipe flanges to customers around the world for many years. Since its establishment in 1984, the company has stood out in the fierce market competition by virtue of its profound understanding of the industry and continuous technological innovation.
The company has 15 sets of advanced production equipments and 6 product production lines. From raw material inspection to product molding, every step of the process strictly follows international standards and industry norms. Our pipe fitting flange products cover a wide range of types and specifications, which can meet the diversified needs of different customers in the fields of petroleum, chemical industry, electric power, construction and so on. The quality of our products is stable and reliable, with excellent performance in key performance indicators such as corrosion resistance and compression resistance, which are trusted by our customers.
In terms of product research and development, the company has its own team of engineers, who have been engaged in research and development positions for 5-8 years, and are able to solve the problems and difficulties we may encounter in product production and sample processing in real time.
In addition to product quality and technological innovation, the company also focuses on customer service. We have established a perfect pre-sale, sale and after-sale service system to provide customers with all-round support. Whether it is product consultation, order processing or after-sales maintenance, we can make our customers feel our professionalism and attentiveness.
Looking to the future, TOBO INDUSTRY (SHANGHAI) CO., LTD. will continue to uphold the business philosophy of "quality first, customer first, innovation and development", and constantly improve its own strength to provide customers around the world with better quality pipe fitting flange products and services, and contribute more to the development of the industry.
Q: What is the difference between concentric and eccentric size head in application?
A: Concentric size head is used to change the diameter of the pipeline, so that the smooth transition of the fluid, suitable for the flow uniformity requirements of high, no special installation space limitations of the occasion, such as general horizontal pipeline transportation. Eccentric head is often used to control the flow direction of fluid or to avoid gas-liquid accumulation, for example, in the import and export piping of pumps, the bottom flat eccentric head can prevent gas from accumulating at the bottom of the pipeline, and the top flat eccentric head can avoid the liquid from accumulating at the top.
Q: How much resistance does a reducer have to fluid?
A: Fluid resistance is related to the dimensional change of the reducer, the roughness of the inner wall, the material, and the flow rate and viscosity of the fluid. Generally speaking, the smoother the dimensional change (e.g., large-size, long-length reducers) and the smoother the inner wall (e.g., finely polished), the lower the resistance to fluid. Specific resistance losses can be estimated through Computational Fluid Dynamics (CFD) simulations or relevant empirical engineering formulas. For example, under standard working conditions, for water flowing at a rate of 1m/s through a DN100 x DN50 stainless steel reducer, the pressure loss may be in the range of 0.01MPa - 0.05MPa, with the specific value fluctuating due to the above factors.
Q: Does the product have quality assurance and related certification?
A: Stainless steel reducers produced by regular manufacturers usually provide a certain period of quality assurance, usually 1 - 2 years, during the warranty period, if the product fails due to product quality problems, the manufacturer will be responsible for repair or replacement. Quality certification, common ISO quality management system certification, indicating that manufacturers have a sound quality management process; for the reducer used in specific industries, such as food, pharmaceutical industry, may need to comply with the appropriate health standards certification, such as 3A certification; in some international projects, may also need to comply with international standards such as ASME, DIN and other international standards certification. When purchasing, suppliers should be required to provide relevant quality assurance documents and certificates.
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