Co-working Developing Co.,Ltd is the Co-working Group's subsidiary,
specialize on manufacture steel pipeline in China.The Tianjin
office opened in 2007 as a representative office is today a fully
operational company to suit the development of the international
We are an integrated enterprise which manufature steel pipe,
flanges, pipefittings and other dozens of product. There are 5
cooperative factories belonging to us. At present, five factory
involving regional respectively refers carbon steel pipe ,
stainless steel pipe, carbon steel pipefittings,flanges,steel soil
and so on.Our company is to develop into a product diversification.
Operated numerous venues. Tens of millions of ultra-turnover group.
Our steel pipe factory put into production in 2008, total
investment of 940 million Yuan, and covers an area of 200 acres.
There are 500 staff currently. The area of the building is 100,000
square meters. Our company is one of the largest professional
manufa-cturers of seamless steel tubes in Hebei Province. The main
products are all kinds of specification of tubes, such as oil
pipeline tubes, casing tubes, GB8162 structure tubes, GB8163 liquid
tubes, GB3087 low-middle pressure boiler tubes, GB5310 high
pressure boiler tubes, and GB6479 special fertilizer tubes, Etc.
All are produced according to standard API5L or API5CT. The annual
production capacity is 300,000 tons. we can offer our clients such
as seamless carbon steel pipe with Outside Diameter Range of pipes
is from 140-273mm(5inch-10inch), and Wall Thickness Range is from
6-40mm(SCH,STD,XS). With Accu-Rolled seamless steel pipe production
line, major manufacturing process includes: Taper Boring,
Accu-Rolling and Three Roll Mini Tension Reducing process.The above
process assures exactly sizing, also keeps high quality on internal
and external surfaces