Small Diameter Thick Wall Steel Pipe GB 20# 45# Carbon Seamless Bright Tube

• Customization: Available
• After-sales Service: 24 Hours Online
• Warranty: 1 Year
• Model NO.: 20# 45#
• Type: Seamless
• Technique: Hot Rolled /Cold Drawn
• Material: Carbon Steel/Alloy Steel
• Surface Treatment: Bare, Oil Coated/Black Painting
• Usage: Pipeline Transport, Boiler Pipe, Hydraulic/Automobile Pipe, Oil/Gas Drilling, Machinery Industry, Chemical Industry, Mining, Construction & Decoration, Special Purpose
• Section Shape: Round
• Grades: St37. St52, SAE1020, SAE1518, Q345b, 45#
• Stock Size: Od32mm- Od580mm
• Wall Thickness: 1mm- 200mm
• Fabrication Type: Cutting
• Fabrication Type 3: Welding
• Packing: in Bundles with Tarpaulin Covering
• New Production Deliveyr Time: 7 Days
• Steel Pipe Type: Thick Wall Steel Pipe
• Outer Diameter: 10-800mm
• Transport Package: Bunlded with Plastic Bags, Shipping by Container
• Specification: OD76*ID56MM
• Origin: China
• HS Code: 7304199000
• Production Capacity: 50000pices/Year

Product Description

Small Diameter Thick Wall Steel Pipe | GB 20# 45# Carbon Seamless Bright Tube

Product Description

Seamless pipe grades and production methods
 

1. Round bar making Hollow Bar
According to the customer's demand material to produce the round bar, then making annealed heat treatment,
then drill the hole as customer demanded inner diameter into the round bar, round bar piercing, making rough
hole, then make precision processing to make outer diameter and inner diameter as requested.
Any size hollow bar can be produced as demanded.

2. Hot rolled Hollow Bar 
using hot rolled steel pipe billet to make heating and piercing, elongating, sizing and strengthening, cooling, finally
hollow bars finished, this is the type most commonly used. Because it is hot rolled, so cost is lowest, but it is suit
for large quantity, for small quantity, it has to be made cold-drawn or round-bar piercing.
size: outer diameter 32mm- 499mm, wall thickness 4mm- 80mm

3. Cold-drawn Hollow Bar
 for outer diameters not over than 63.5mm, small-size hollow bar, when demanded quantity is under 5 tons, usually
make cold-drawn hollow bar, using larger-size hot-rolled hollow bar to draw to the size demanded.
Some size can be finished only by one time drawing, but some other sizes might need twice or three times to finish
drawing, it takes time, so the cost is higher.
cold drawn size outer diameter 32mm- 63.5mm

4. Hot-expanding Hollow Bar
 For hollow bar sizes are special, not common sizes, have to use smaller thicker-walled hollow bar to hot expand to be
larger size hollow bar, but the technical property for the hot-expanded hollow bar will be lower than the original hollow
bar. Size: outer diameter over 356mm.

 

Seamless Steel pipe grades
 

Descriptions	Grades
Structural pipe	20# 35# 45# Q345B, 16Mn, Q345B-E, 20Mn2, 25Mn, 30Mn2, 40Mn2, 45Mn2, SAE1018, SAE1020, SAE1518, SAE1045.
Liquid pipe	20# q295b-e, q345b-e
High pressure boiler tube	20G 15MnG 20MnG 15CrMoG, 12Cr1MoVG, St35.8, sa106b, sa106c, sa210a, sa210c, A333P2, A333P11, A33P12, A333P22, A33P36, A333P91, A333P92, A335T2, A335T11, A335T12, A335T22, A335T91, A335T23, A335T9
Pipeline	API SPEC 5L, X42, X52, X60, X65,X70,X80, ASTMA53, ASTM A106, ASTM A333, BS301, BS3602, BS3603, BS3604, PSL1, PSL2, DNV-OS-F101, CSA-Z245
Alloy pipe	4140, 42CrMo, 32CrMo, 15CrMo,
Packing	Black paint, Varnish painting, Tarpaulin packing
End	Common round end, beveled.
Processing	Galvanizing; cutting; making thread outside the pipe; Machining.
outer diameter	10mm- 800mm
wall thickness	1mm- 200mm

Detailed Photos

Technological Process
 

 

Mill Test or Inspection
 

 

 

Packaging & Shipping

Packaging & Shippin

 

Company Profile

FAQ