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GB6479 High-pressure Chemical Fertilizer Equipments Seamless Steel Tubes Application:Seamless steel tubes of best quality carbon steel ,low alloy steel and stainless steel for high-pressure chemical fertilizer equipment and piping as well as for other chemical equipment. OD:14-426mm WT:0.5-45mm Length:4-12m Manufacture method:The manufacture method of steel and tube blank shall meet what specified in YB/T 5137.Steel tubes shall be manufacturd by seamless method of hot rolling

Seamless Steel Tubes for Structural Purposes GB/T 8162 Spec: Material:10# 20# 45# 20Mn 25Mn Q235 Q345 Size Range: OD:3-1200mm, WT:0.5-200mm, General Length:3-12m Tolerance: According to the following tables or customers’ request. Characteristic: Good concentricity Good OD and ID tolerance High Precision Stable quality Smooth Roughness TORICH QUALITY ASSURANCE Tolerance of the OD &WT: OD Tolerance: Production Method OD Tolerance Hot Rolling(Extrusion) ±1% or ±0.50mm Cold Drawn

GB/T3093 High-pressure Seamless Steel Tubes For Diesel Engine Production process:Cold drawing bright heat treatment without oxidization 100%nondestructive testing inside flushing under the high pressure antirust oiling outer and inner surface. Application:Manufacturing diesel injection system of high pressure oil pipe in cold drawn seamless steel tube size:OD:6-530mm WT:0.5-38.1mm Length:1.5-6m Steel Grade And Chemical component Unified digital code Grade Chemical Component

GB3087 Low Medium Pressure Seamless Carbon Steel Pipes For Boilers Standard:GB3087 Seamless Carbon Steel Tubes for Low And Medium Pressure Boiler Steel Grade/Steel Material/Steel Number: Grade Chemical Analysis % C Si Mn Cr Ni Cu 10 0.07-0.13 0.17-0.37 0.35-0.65 ≤0.15 ≤0.30 ≤0.25 20 0.17-0.23 0.17-0.37 0.50-0.80 ≤0.25 ≤0.30 ≤0.25 Grade Mechanical Properties Rm/Mpa Rel/Mpa A/% WT≤16 WT＞16 10 335-475 205 195 ≥24 20 410-550 245 235 ≥20 Size Range: OD: 6-350mm WT:1-35mm Length:4

GB8163/T Cold Drawn Seamless Carbon Steel Tube Heat Treatment: Hot Rolling & Cold Drawn Tolerance of the OD &WT: OD Tolerance: Production Method OD Tolerance Hot Rolling(Extrusion) ±1% or ±0.50mm Cold Drawn(Cold Rolled) ±1% or ±0.30mm Tolerance for wall thickness: 1.Wall thickness tolerance of Hot Rolling steel tube: Production Method OD (DN) WT/OD Tolerance Extruded tube ≤102 / ±12.5% or ±0.40mm ＞102 ≤0.05 ±15% or ±0.40mm ＞0.05-0.10 ±12.5% or ±0.40mm ＞0.10 +12.5% -10% Heat

Cold Drawn Seamless Stainless Steel Tubes Fully Annealed Plain Production describe Steel Grade/Steel Material:304/304L,316/316L,314,321,347H Steel pipe standard:ASTM213 ASTM199 Characteristic: Good concentricity Good OD and ID tolerance High Precision Stable quality Smooth Roughness TORICH QUALITY ASSURANCE Production Processs: RAW MATERIAL ↓ INCOMING INSPECTION ↓ STORAGE → CUTTING→HAMMERING → PICKING LUBRICATION → CLEANING → PHOSPHORI CLEAN ↓ ENDS CUTTING←STRAIGHTENING←HEAT

DIN EN10297 E235 E275 E470 Seamless Steel Tubes for Mechanical and General Engineering Purposes The Seamless Steel Tubes are produced by Cold Drawn or Cold Rolled, for small diameters below 88.9mm, the bigger diameter are produced by hot rolling. These steel tubes will be used for mechanical engineerings, could be also used as mother tube for further cold drawn production to achieve better tolerance and surface smoothness as precision steel tubes. Classification of steel

EN 10305-4 Seamless Cold Drawn Pipe for Precision Applications The tubes shall be manufactured from hot finished seamless tubes by cold drawing. Other suitable methods of cold working are permitted. The tubes shall be delivered in the delivery condition +N which means that after the final cold drawing operation the tubes are normalized in a controlled atmosphere. Size and tolerances Specified outside diameter with tolerance Specified inside diameter with tolerance Wall

EN 10305-4 Standard Steel Pipe for hydraulic and pneumatic power systems The steelmaking process of EN10305-4 is at the discretion of the manufacturer and steels shall be fully killed. The tubes shall be manufactured from hot finished seamless tubes by cold drawing. Other suitable methods of cold working are permitted. The tubes shall be delivered in the delivery condition +N which means that after the final cold drawing operation the tubes are normalized in a controlled