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GB/T9808 STM-R780 High Straightness Seamless Steel Tubes for Drilling our products apply to geological core drilling,water well drilling,hydrogeoligical drill,casing material for engineering drilling,core tube material and casing coupling Seamless Steel Tubes,ordinary drill pipe material and drill pipe joint Seamless Steel Tubes,rope coring drill pipe material and drill pipe joint Seammless Steel Tubes,drill collar material and drill collar lock joint Seamless Steel Tubes.

GB6479 Seamless Steel Tubes For High Pressure Chemical Fertilizer Equipments Seamless Steel Tubes Steel Grade/Steel Material:10#, 20#, 45#, 12CrMo Steel pipe standard:GB6479 size: OD:10.00—700mm WT:1.00—60mm Length: 5.8m, 6m,or as required. Production Processs: RAW MATERIAL ↓ INCOMING INSPECTION ↓ STORAGE → CUTTING→HAMMERING → PICKING LUBRICATION → CLEANING → PHOSPHORI CLEAN ↓ ENDS CUTTING←STRAIGHTENING←HEAT TREATMENT↔MIDDLLE CHECK↔ COLD DRAWING ← LUBRICATING ↓ FINAL

GB18248 34CrMo4 30CrMnSiA Seamless Steel Tubes for Gas Cylinder Products Description: GB18248 34CrMo4 30CrMnSiA Seamless Steel Tubes for Gas Cylinder Well-finished inside and outside surface. Alloy Steel tubes and pipes. Standard: GB18248 JIS G3429 Applications: for High Pressure Gas Cylinder Size Range: OD: 5-420mm WT: 0.5-50mm Length:4-12m Relevant standard: KS D3573 The Steel Refining Method: The steel is Killed steel refined in electric furance or oxygen converter. The

GB5310 20G 20MnG 20MoG High Pressure Seamless Steel Boiler Pipes Standard:Seamless Steel Tubes and Pipes for High Pressure Boiler Steel Grade/Steel Material/Steel Number: Grade Chemical Analysis % C Si Mn Cr Mo V P S 20G 0.07- 0.23 0.17- 0.37 0.35- 0.65 - - - ≤0.025 ≤0.015 20MnG 0.17- 0.23 0.17- 0.37 0.70- 1.00 - - - ≤0.025 ≤0.015 25MnG 0.22- 0.27 0.17- 0.37 0.70- 1.00 - - - ≤0.025 ≤0.015 15MoG 0.12- 0.20 0.17- 0.37 0.40- 0.80 - 0.25- 0.35 - ≤0.025 ≤0.015 20MoG 0.15- 0.25 0

Seamless Steel Tubes and Pipes for High Pressure Boiler GB 5310 Spec: Material:20G 20MnG 25MnG Size Range:OD:4-1200mm WT:0.3-200mm General Length:4-12.5m Tolerance: According to the following tables or customers’ request. Producing method Size Tolerance General High grade Hot rolling (extrude) D 54~325 S≤35 ±0.75% ±0.5% S>35 ±1% ±0.75% >325 ±1% ±0.75% S ≤4.0 ±0.45 ±0.35 >4.0~20 ±12.5%-10% ±10% >20 D25.4~40 ±0.20 _ >40~50 ±0.25 _ >50~60 ±0.30 _ >60 ±0.5% _ S ≤3.0 ±0.3 ±0.2 &g

Products Description: GB/T 8163 10 20 Carbon Steel Seamless Steel Pipe Tube for Liquid Service Steel Grade/Steel Material: Mechanical Properties(longitudinal): Steel Grade Tensile Strength MPa Yield Strength MPa Elongation % s≤16 s＞16 no less than 10 335-475 205 195 24 20 410-550 245 235 20 Q295 430-610 295 285 22 Q345 490-665 325 315 21 Delivery Condition: hot rolling, annealing, normalizing Size Range: OD: 5.0-660mm WT:0.5-60mm Length: max 12000mm Our regularproduction size

ASTM A179 Cold-Drawn Low-Carbon Seamless Steel Tube for Heat-Exchanger and Condenser is widely used for Marine boiler and superheater and Ⅰ, Ⅱ pressure piping with seamless steel tube manufacturing. This kinds of steel pipe is made by material of 320/360/410/460/490 according to the GB/T 5312 standard. Size: Outer Diameter: 6-1000 mm,Wall Thickness: 1- 80 mm,Length :1-12m or as your request Application:Manufacture of boilers or superheater. Material:10#.20#.16Mn.A106(B,C)

Seamless Steel Tubes for Low and Medium Pressure Boiler GB 3087 Spec: Material:10# 20# STB33/42 st35.8 Size Range:OD:4-1200mm WT:0.3-200mm General Length:4-12.5m Tolerance: According to the following tables or customers’ request. 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

Seamless Steel Tubes for Liquid Service GB/T 8163 10# 20# Spec: Material:10# 20# Q295 Q345 st35.8 Size Range:OD:4-1200mm WT:0.3-200mm General Length:3-12.5m 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