Hongji Steel Pipe — Your Trusted Seamless Steel Pipe Expert!

We produce and supply the following seamless steel pipes:
Steel grades: 20#/20G/35#/45#/10#/27SiMn/09DG/16MnDG/15CrMoG/12Cr1MoVG/1Cr5Mo/12Cr5Mo/12Cr2Mo/Q345B/Q345C/Q345D/Q345E/P5/P11/P12/P22/T22/T23/T1/T91/T12/T11/T5/40Cr/Gr.B/X42/X46/X52/X56/X60/SA210A1/SA210C/ST35/ST45/ST52/ST44/ST37/ST35.8/ST45.8/13CrMo44/13CrMo4-5/15Mo3/16Mo3/10CrMo9-10/STPG370/STS370/STB340/STB35/STB410/STB42/STB510/STB52/STBA25/STBA23/STBA22/STBA24/STBA12/35CrMo/42CrMo/E355/E235/E255/C35E/C45E/42CrMo4/P195GH/P235GH/P265GH/CFS320/HFS320/37Mn5/J55/K55/N80/41Cr4/STK290/STK400/STK490/STKM11A/STKM12A/STKM12B/STKM13A/STKM13B/STKM13C/TU37-C/TU42-C/Gr.1/Gr.6/Gr.3/09CrCuSb(ND)/09MnD/08Cr2AlMo, etc.
Implementation standards:

GB/T3087-2008 Seamless steel tubes for low and medium pressure boilers

GB/T5310-2017 Seamless steel tubes for high-pressure boilers 

GB/T5312-2009Seamless carbon and carbon-manganese steel tubes for shipbuilding

GB/T6479-2013 Seamless steel tubes for high-pressure fertilizer equipment

GB/T8162-2018 Seamless steel tubes for structural purposes
GB/T8163-2018 Seamless steel tubes for fluid transportation 

GB/T9711-2017 Steel pipes for pipeline transportation systems in the petroleum and natural gas industries

GB/T9948-2013 Seamless steel tubes for petroleum cracking 

GB/T17396-2009 Hot-rolled seamless steel tubes for hydraulic support

GB/T18984-2016 Seamless steel tubes for low-temperature pipelines

GB/T19830-2011 Steel pipes for casing and tubing in oil and gas wells

GB/T 24591-2009 Seamless steel tubes for high-pressure feedwater heaters

NB/T47019.2-2011 Boiler and heat exchanger tubes (non-alloy and alloy steel tubes with room temperature properties)

NB/T47019.3-2011 Boiler and heat exchanger tubes (non-alloy and alloy steel tubes with high-temperature properties)

NB/T47019.4-2011 Boiler and heat exchanger tubes (low-alloy steel tubes for low-temperature service)

GB/T150.2-2011------09CrCuSb (ND steel) steel tubes resistant to sulfuric acid dew point corrosion

SH/T 3405-2012 Steel pipes for petrochemical industry

HG/T20553-2011 Seamless steel tubes for chemical piping

CB/T3075-2011 Seamless steel tubes for shipbuilding

API Spec 5L Line pipe for petroleum and natural gas industries
API Spec 5CT Specification for casing and tubing   

ASTM A53/ASME SA53 Black and hot-dipped zinc-coated seamless steel pipe

ASTM A106/ ASME SA106 Seamless carbon steel pipe for high-temperature service

ASTM A161/ ASME SA161 Seamless low-carbon and carbon-molybdenum steel distillation tubes for refinery service

ASTM A179/ASME SA179 Seamless cold-drawn low-carbon steel tubes for heat exchangers and condensers

ASTM A192/ASME SA192 Seamless carbon steel boiler tubes for high-pressure service

ASTM A199/ASME SA199 Seamless cold-drawn alloy steel tubes for heat exchangers and condensers

ASTM A200/ASME SA200 Seamless medium-alloy steel furnace tubes for refinery service

ASTM A209/ASME SA209 Seamless carbon-molybdenum alloy-steel boiler and superheater tubes

ASTM A210/ASME SA210 Seamless medium-carbon steel boiler and superheater tubes

ASTM A213/ASME SA213 Seamless alloy-steel boiler, superheater, and heat-exchanger tubes

ASTM A333/ASME SA333 Seamless steel tubes for low-temperature service

ASTM A334/ASME SA334 Seamless carbon and alloy steel tubes for low-temperature service

ASTM A335/ASME SA335 Seamless ferritic alloy-steel pipes for high-temperature service

ASTM A519/ASME SA519 Seamless carbon and alloy steel mechanical tubing

ASTM A524/ASME SA524 Seamless carbon steel pipe for atmospheric and lower temperatures

ASTM A556/ASME SA556M Seamless cold-drawn carbon steel feedwater heater tubes
BS 3059 Seamless steel tubes for boilers and superheaters  

BS 3601 Carbon steel tubes with specified room temperature properties for pressure purposes

BS 3602-1 Steel tubes for pressure purposes - Carbon and carbon manganese steel tubes with specified elevated temperature properties

EN 10210-1 Hot finished structural hollow sections of non-alloy and fine grain structural steels

EN 10216-1 Seamless steel tubes for pressure purposes - Part 1: Non-alloy steel tubes with specified room temperature properties

EN 10216-2 Seamless steel tubes for pressure purposes - Part 2: Non-alloy and alloy steel tubes with specified elevated temperature properties

EN 10216-3 Seamless steel tubes for pressure purposes - Part 3: Alloy fine grain steel tubes

EN 10255-S195T Non-alloy steel tubes suitable for welding and threading

EN 10297-1 Seamless circular steel tubes for mechanical and general engineering purposes    

EN 10305-1 Steel tubes for precision applications - Seamless cold drawn tubes      
DIN 1629 Seamless circular tubes of non-alloy steels with special quality requirements

DIN 1630 Seamless circular tubes of high-grade carbon steels  

DIN 2391 Seamless precision steel tubes, cold drawn

DIN 2448 Seamless steel tubes

DIN 17175 Seamless tubes of heat-resistant steels   

JIS G3441 Alloy steel tubes for mechanical structures 

JIS G3444 Carbon steel tubes for general structural purposes

JIS G3445Carbon steel square tubes for general structural purposes

JIS G3454 Carbon steel pipes for pressure service

JIS G3455 Carbon steel pipes for high pressure service

JIS G3456 Carbon steel pipes for high temperature service

JIS G3458 Alloy steel pipes

JIS G3460 Steel pipes for low temperature service
JIS G3461 Steel tubes for boilers and heat exchangers

JIS G3462 Alloy steel tubes for boilers and heat exchangers

JIS G3464 Steel tubes for heat exchangers for low temperature service                                                              

NF A49-211 Seamless non-alloy steel tubes with plain ends for the conveyance of fluids at elevated temperatures

NF A49-212 Seamless carbon steel tubes for medium temperature service               

NF A49-213 Seamless tubes of non-alloy and molybdenum and chromium-molybdenum alloy steels for elevated temperature service

NF A49-215 Seamless tubes of non-alloy and ferritic alloy steels for heat exchangers

GOST 550-1975 Seamless steel tubes for petroleum refining and petrochemical industries  

ISO 11960 Petroleum and natural gas industries - Steel pipes for use as casing or tubing for wells      

ISO 3183 Petroleum and natural gas industries - Steel pipe for pipeline transportation systems

ISO 9329-1 Seamless steel tubes for pressure purposes - Technical delivery conditions - Part 1: Unalloyed steels with specified room temperature properties

ISO 9329-2 Seamless steel tubes for pressure purposes - Technical delivery conditions - Part 2: Unalloyed and alloyed steels with specified elevated temperature properties

ISO 9329-3 Seamless steel tubes for pressure purposes - Technical delivery conditions - Part 3: Unalloyed and alloyed steels with specified low temperature properties-
BV, DNV, GL, LR, NK, KR, RINA, ABS, CCS Marine seamless steel pipes