Product Description
| Connection | Bevel End,Plain End | |
| Surface Finish | Anti-Rust Oil,Black Painting,Electrical Zinc Plated,Cold Galvanised,Hot Dipped Galvanised... | |
| Technology | Seamless,Welded | |
| Standard | American Standard | ANSI B16.9,ASME B16.28,ASME B16.25,ASME B36.10M,MSS SP-43,MSS SP-75 |
| European Standard | EN10253-1,EN10253-2 | |
| British Standard | BS1965 | |
| Japan Standard | JIS B2311,JIS 2312,JIS 2313 | |
| Korea Standard | KS B1522, KS B1541,KS B1543 | |
| Germany Standard | DIN2605,DIN2615,DIN2616,DIN2617,DIN2618,DIN86088,DIN86089,DIN86090 | |
| Russia Standard | GOST 17375,GOST 17376,GOST 17378,GOST 17379,GOST 17380,GOST 30753 | |
| Size | 1/2"-80" // DN15-DN2000 // 15NB-2000NB | |
| Wall Thickness | SCH5S,SCH10S,SCH10,SCH40S,STD,XS,XXS,SCH20,SCH30,SCH40,SCH60,SCH80,SCH160,XXS | |
| Materials | Stainless Steel | A403 WP304,304(L),316(L),321,310S,347H,316Ti,317(L),F904L,1.4301,1.4307,1.4401,1.4571,1.4541 |
| Packages | Plywood Cases or Plywood Pallets or Boxes | |
| Application | Petrochemical & Gas Industry,Chemical,Machinery,Electric Power,Ship Building,Construction Water Works,Valve Industry. | |
| Advantages | High Quality + Ready Stock + Faster Delivery + Customized | |
| 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 |
