Limestone Quarry Plant

One of the Top 500 enterprises in China foreign trade

QCCO was approved as a member of “China Association for Contracting Projects Abroad “and granted a membership certificate on Sep 28,2005; “Credibility Rating AAA certificate in Foreign Trade” was granted to QCCO by China Shippers’ Association


3/4" seamless steel tube,3/4" seamless steel pipe


1.3/4"seamless steel tube 
3.Min Order:10 tons 
4.large Stocks available


Steel pipe |
Seamless steel pipe|
Carbon steel pipe|
Galvanized steel pipe|
Galvanized pipe

Product name 3/4" seamless steel tube
Outside Diameter 5-1170mm
Wall Thickness 1-400mm
Material 10# 20# 45# Q235 Q195 Q345
Origin China
Certificate API5L ISO9000 API 5CT
Technique hot rolled
application use for oil well, boilers, precision machines, petro-chemical, ship, structure pipe, building, fluid tubes, line pipe etc
Testing we have professional testing equipments such as ultrasonic testing machine,eddy current testing machine, mechanics testing machine to make sure high quality
Tolerance: WT TOLERANCE-5%+5%
Min Order 10 TON
Usage Petroleum and natural gas industry, chemical industry, electric industry, flammable and non-flammable liquid transportation and steel construction, drainage project and city construction etc.
Package in bulk , in bundle,standard seaworthy package
Length  1-12M
Delivery time 15-20 days after received the advanced payment

has recently brought into a set of hot rolled fluid steel pipe production line, which can produce 57630×318mm hotrolled seamless steel pipe. Also It has a set of largecaliber thick wall bifilar double sided spiral pipe production line, which can produce  4263000×1050mm thick wall steel pipes. The products can meet a certificate of GB/T8162\81631999 API5Land have got the production license


Stainless steel pipe|
API pipe|
ERW pipe|

Seamless steel pipe|our hot sale products as follow:

type Outer diameter
Wall thickness(S)          
cold drown OD(mm) Allowable deviation
Wall thickness(mm) Allowable deviation
30~50 ±0.3 30 ±10%          
50~219 ±0.8%          
hot rolled 219 ±1.0% 20 ±10%          
Mechanical Propert              
standard grade Tensile strength
Yield strength(MPa) Elongation(%)          
GB/T8163 10 335~475 205 24          
20 410~550 245 20          
Q345 490~665 325 21          
Chemical composition                
standard grade Chemical Composition(%)
C Si Mn P S Cr Ni Cu
GB/T8163 10 0.07~0.14 0.17~0.37 0.35~0.65 0.035 0.035 0.15 0.25 0.25
20 0.17~0.24 0.17~0.37 0.35~0.65 0.035 0.035 0.25 0.25 0.25
Q345 0.12~0.20 0.20~0.55 1.20~1.60 0.045 0.045 / / /






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