Black Steel Seamless Pipes

We are peculiarly known as one of the leading Black Steel Seamless Pipes Manufacturers and exporters in China. Moreover, we manufacture high tensile strength Seamless Steel Pipes. In addition to this, we offer seamless steel products at very reasonable prices.
Specification:
1.Standard:ASTMA106 GRB,API5L GRB,ASTM A53GRB,GB3087-1999
2.Material :A106/A53 GRB API5L GRB 20# CHINESE
3.OD:1/4"-24",13mm-610mm
4.WT:SCH20,SCH40,SCH60,SCH80,SCH100,SCH120,SCH160,XXS
5.Usage:Boiler use,water transport,buiding,machinery,traffic aviation oil development ,etc.
6.length:4-12m Random,5.8M FIXED,6M FIXED,9M FIXED
7.Surface:Black paint as rusty protect or as request
ASTM A 53 specification for black steel seamless pipes
ASTM A 106 Gr. B seamless carbon steel pipes for high-temperature service
ASTM A 161 seamless low-carbon and carbon molybdenum steel still tubes for refinery service
ASTM A179 specification for seamless cold-drawn low-carbon steel heat-exchanger and condenser tubes
ASTM A192 specification for seamless carbon steel boiler tubes for high-pressure service
ASTM A 210 specification for seamless medium-carbon steel boiler and superheater pipes
ASTM A 213 specification for seamless ferrite alloy steel boiler, superheater and heat-exchanger pipes
ASTM A 519 seamless carbon and alloy steel for mechanical tubing
ASTN A 556 seamless cold-drawn carbon steel feed water heater tubes