How to test seamless steel pipe?Which projects are the focus!
Seamless steel pipe is a kind of long steel with hollow section and no joint around.The steel pipe has a hollow section and is widely used for conveying fluid pipelines, such as conveying oil, natural gas, gas, water and some solid materials.Compared with solid steel such as round steel, steel pipe has the same bending and torsional strength and lighter weight. It is a kind of economic cross-section steel and is widely used in the manufacture of structural parts and mechanical parts, such as oil drill pipe, automobile drive shaft, bicycle frame and steel scaffolding used in construction.
Detection period:
5 working days at most.
Test criteria:
DB, GB, GB/T, JB/T, NB/T, YB/T, etc.
Seamless steel tube testing type:
Seamless hot rolled seamless steel pipe testing: including general steel pipe, low and medium pressure boiler steel pipe, high pressure boiler steel pipe, alloy steel pipe, stainless steel pipe, petroleum cracking pipe, geological steel pipe and other hot rolled seamless steel pipe testing.
Seamless steel tube cold rolled seamless steel tube testing:Including general structure, mechanical structure with seamless steel tube, low medium pressure boiler seamless tube, high pressure boiler seamless tube, transmission fluid with seamless tube, cold drawn or cold precision steel pipe seamless pipe, geological drilling, drilling pipe, hydraulic cylinder cylinder precision inner diameter seamless pipe, seamless tube for fertilizer, a ship with pipe, oil cracking tube, all kinds of alloy cold rolled seamless steel tubes such as detection.
Seamless steel tube round seamless steel tube testing: petroleum geology drilling tube, petrochemical cracking tube, boiler tube, bearing tube and automobile, tractor, aviation high-precision structural steel tube testing.
Seamless steel pipe testing: hot rolled stainless steel pipe, hot extrusion stainless steel pipe and cold drawn (rolled) stainless steel pipe, semi-ferritic semi-Martensitic stainless steel pipe, martensitic stainless steel pipe, austenitic stainless steel pipe, austenite-ferritic iron system stainless steel pipe, etc.
Seamless pipe jacking detection: tube jacking detection of air pressure balance, mud water balance and earth pressure balance.
Testing of special-shaped seamless steel tubes: including square, oval, triangle, hexagonal, melon shaped, star shaped, and winged seamless steel tubes.
Seamless steel pipe thick-wall testing: hot-rolled thick-wall seamless steel pipe, cold-rolled thick-wall seamless steel pipe, cold-drawn thick-wall seamless steel pipe, extruded thick-wall seamless steel pipe, stainless steel seamless steel pipe jacking structure, etc.
Seamless steel pipe testing: including general steel pipe, low and medium pressure boiler steel pipe, high pressure boiler steel pipe, alloy steel pipe, stainless steel pipe, petroleum cracking pipe, geological steel pipe and other steel pipe.
Seamless steel pipe testing items:
Chemical properties test high temperature resistance, low temperature resistance, acid resistance, alkali resistance, oxidation resistance, etc.
Process performance test wire stretching, fracture inspection, repeated bending, reverse bending, reverse flattening, two-way torsion, hydraulic test, flaring test, bending, crimping, flattening, ring expansion, ring stretching, microstructure, cup process test, metallographic analysis, etc.
Nondestructive testing X – ray nondestructive testing, electromagnetic ultrasonic testing, ultrasonic testing, eddy current testing, magnetic flux leakage testing, penetration testing, magnetic particle testing.
Mechanical properties test tensile strength, impact test, yield point, elongation after fracture, area reduction, hardness index (Rockwell hardness, Brinell hardness, Vickers hardness, Richter hardness, Vickers hardness).
Other items: metallographic structure, inclusions, decarburization layer, content determination of microstructure, corrosion cause analysis, grain size and microscopic rating, low structure, intergranular corrosion, microstructure of superalloy, high temperature metallographic structure, etc.
Analysis items: comparative analysis, material identification, failure analysis, component analysis.
Chemical analysis failure analysis fracture analysis, corrosion analysis, etc.
Element analysis Accurately detect and analyze the composition and content of manganese, oxygen, nitrogen, carbon, sulfur, silicon, iron, aluminum, phosphorus, chromium, vanadium, titanium, copper, cobalt, nickel, molybdenum, cerium, lanthanum, calcium, magnesium, zinc, tin, antimony, arsenic and other metal elements in metal, alloy and its products, stainless steel.
Test standard for seamless steel pipe (part) :
GB 18248-2008 Seamless steel tubes for gas cylinders.
2, GB/T 18984-2016 seamless steel pipe for low temperature pipeline.
3, GB/T 30070-2013 Alloy steel seamless steel pipe for seawater transportation.
4, GB/T 20409-2018 Seamless steel tubes with internal thread for high pressure boilers.
5, GB 28883-2012 composite seamless steel tubes for pressure.
GB 3087-2008 Seamless steel tubes for low and medium pressure boilers.
7, GB/T 34105-2017 Seamless steel tubes for offshore engineering structures.
GB 6479-2013 Seamless steel tubes for high pressure fertilizer equipment.