Product name: spot materials are subject to standard spot specifications. Product application alloy tube 12Cr 1MoVG

12CrMoG

15CrMoG

12 Cr 2 mo & lt； A335P22 & gt

Cr5Mo & ltA335P5 & gt

Cr9Mo & ltA335P9 & gt

10 Cr 9 mo 1 vnb & lt； a335p 9 1 & gt；

15 nicumonb 5 & lt； WB36 & gt

12 Cr 2 mowvtib & lt； Iron and steel research102 > GB53 10- 1995

GB6479-2000

GB9948-2006

DIN 17 175-79

ASTM SA335

ASTM SA2 13

JISG3467-88

JISG 3458-88 ∮ 8-1240 *1-200 is suitable for high-temperature, low-temperature and corrosion-resistant seamless steel pipes in petroleum, chemical, electric power and boiler industries. Stainless steel pipe 0Cr 18Ni9

00cr 19ni 10 & lt； 304L & gt

00 Cr 25 ni 20 & lt； 3 10S & gt；

0cr 17ni 12mo 2 & lt； 3 16 >

00cr 17ni 14mo 2 & lt； 3 16L & gt；

1cr 18 ni9 ti & lt； 32 1 & gt；

0Cr 18Ni 10Ti

0cr 18ni 1 1Nb & lt； 347 >GB/T 14975-2002

GB/T 14976-2002

GB 13296-2007

ASTM A2 13

ASTM A269

ASTM A3 12

JIS G3459

DIN 17458 ∮6-630*0.5-60 is suitable for low-temperature pipelines 16MnDG, 10MnDG, 09DG in petroleum, aviation, smelting, food, water conservancy, electric power, chemical industry, chemical fiber, medical machinery and other industries.

09Mn2VDG、06Ni3MoDG

ASTM grade 1

Astm a333 grade 3

Astm a333 grade 4

ASTM A333 Grade 6

ASTM A333 Grade 7

ASTM A333 Grade 8

ASTM A333 Grade 9

ASTM grade 10

National standard GB/t 1 18984-2003

ASTM A333 ∮ 8-1240 *1-200 is suitable for 20G seamless steel tube high-pressure boiler tubes for low-temperature pressure vessel pipelines and low-temperature heat exchanger pipelines at -45℃ ~- 195℃.

ASTM SA 106B/C

ASTM SA2 10A/C

ST 45.8-III GB 53 10- 1995

ASTM SA 106

ASTM SA2 10

DIN17175-79 ∮ 8-1240 *1-200 is suitable for manufacturing high-pressure fertilizer pipes such as heat pipes, headers and steam pipes of high-pressure boilers.

20

16mngb6479-2000 ∮ 8-1240 *1-200 is suitable for chemical equipment and pipeline oil cracking pipes with working temperature of -40-400℃ and working pressure of 10-32Mpa.

20 GB 9948-2006 ∮ 8-630 *1-60 medium and low pressure boiler tubes for refinery 10#

20#

16Mn & lt； Q345A。 The fifth century BC. Gb 3087-2008 ∮ 8-1240 *1-200 is suitable for manufacturing conveying fluid pipes of low-pressure and medium-pressure boilers and locomotive boilers 10# and 20# with various structures.

TM A 106 a，B，C，A53A，B

16Mn & lt； Q345A。 The fifth century BC. GB/T8 163-2008

ASTM A 106

ASTM A53 ∮ 8-1240 *1-200 is suitable for ordinary seamless steel pipes conveying fluids. Common structural pipes 10#, 20#, 45# and 27SiMn.

ASTM A53A，B

16Mn & lt； Q345A，B，C，D，E & gtGB/T8 162-2008

GB/T 17396- 1998

ASTM A53 ∮ 8-1240 *1-200 is suitable for general structures, engineering supports, machining and other oil casings J55, K55, N80 and L80.

C90、C95、P 1 10 API SPEC 5CT

iso 1 1960 ∮60.23-508.00

*4.24- 16. 13 tubing is used to extract oil or natural gas from oil wells. Casing is used as sidewall pipelines A, B, X42, X46, X52, X56, X60, X65, X70 and X80 of oil and gas wells.

L245、L290、L360、L4 15、L450 API SPEC 5L

GB/T97 1 1. 1

Gb/t 9711.2 ∮ 32-1240 * 3-100 is used for oxygen, water and oil pipelines 20, Q 195 and Q2/kloc in the oil and gas industry.

Q235A、B、Q345A、B、C、D、E GB/T 13793- 1992

Gb 3091-2001∮ 32-630 *1-30 is suitable for spiral steel pipes such as Q235A-B, Q345a-e sy/t5037-2000 219-2820.

Stainless steel seamless steel pipe is a kind of strip steel with hollow section and no seam around it. stainless steel seamless tube

Features of stainless steel seamless pipe:

First, the thicker the wall thickness of the product, the more economical and practical it is, and the thinner the wall thickness, the higher the processing cost. Secondly, the process of this product determines its limited performance. Generally, the precision of seamless steel pipe is low: uneven wall thickness, low brightness on the inner and outer surfaces of the pipe, high cut-to-length cost, and pits and black spots on the inner and outer surfaces are not easy to remove; Third, its detection and shaping must be done off-line. Therefore, it shows its advantages in high pressure, high strength and mechanical structure materials.

Types of stainless steel pipes:

Rolling methods include hot rolling, hot extrusion and cold drawing (rolling) of stainless steel pipes.

According to the different metallographic structure of stainless steel, it can be divided into semi-ferritic semi-martensitic stainless steel tubes, martensitic stainless steel tubes, austenitic stainless steel tubes and austenitic-ferritic stainless steel tubes.

Specification and appearance quality of stainless steel pipes;

A According to GB 14975-94 Seamless Stainless Steel Pipe, the usual steel pipe length (indefinite length) is 1.5 ~ 10m for hot-rolled steel pipe and 1m for hot-extruded steel pipe. The wall thickness of cold-drawn (rolled) steel pipe is 0.5 ~1.0 ~ 7m; ， 1.0 ~ 7m； If the wall thickness is greater than 1.0mm, it is 1.5 ~ 8m.

B, 45 kinds of hot-rolled (hot-extruded) steel pipes with diameters of 54 ~ 480mm * * * * 36 species with wall thickness of 4.5 ~ 45 mm * * *. 65 kinds of cold-drawn (rolled) steel pipes with diameters of 6 ~ 200mm * * *; The wall thickness is 0.5 ~ 2 1mm * * * 39 kinds.

C. There shall be no cracks, folds, cracks, cracks, rolling injuries, delamination and scarring on the inner and outer surfaces of steel pipes. These defects shall be completely removed (except for pipes used for mechanical processing), and the thickness and outer diameter of the removed rear wall shall not exceed negative deviation. Other minor surface defects not exceeding the allowable negative deviation may not be removed.

D, the allowable depth of the straight line. Hot-rolled and hot-extruded steel pipes with a diameter less than or equal to 140mm should not be greater than 5% of the nominal wall thickness, and the maximum depth should not be greater than 0.5mm；; Cold-drawn (rolled) steel pipes should not be greater than 4% of the nominal wall thickness, and the maximum depth should not be greater than 0.3 mm. ..

E, steel pipe ends should be cut into right angles, and deburring. Manufacturing technology of stainless steel seamless steel pipe;

1. Hot rolling (extrusion of seamless steel tube): round tube blank → heating → piercing → three-roll skew rolling, continuous rolling or extrusion → tube stripping → sizing (or reducing) → cooling → straightening → hydrostatic test (or flaw detection) → marking → warehousing.

The raw material for rolling seamless pipes is a round tube blank, which is cut by a cutting machine to a length of about 1 m and sent to a furnace by a conveyor belt for heating. The billet is heated in the furnace at a temperature of about 1200℃. The fuel is hydrogen or acetylene. Temperature control in the furnace is a key problem. After the round tube blank is discharged from the furnace, it should be perforated by a pressure piercer. The common piercer is the cone roller piercer, which has the advantages of high production efficiency, good product quality, large aperture expansion, and can pierce a variety of steel grades. After piercing, the round tube blank is continuously rolled by three rollers, continuously rolled or extruded. After extrusion, remove the tube and measure the size. The sizing machine rotates the conical drill bit to the billet at high speed to punch holes to form steel pipes. The inner diameter of the steel pipe is determined by the outer diameter length of the drill bit of the sizing machine. After sizing, the steel pipe enters the cooling tower and is cooled by spraying water. After cooling, the steel pipe will be straightened.

2. Cold-drawn (rolled) seamless steel tube: round tube blank → heating → piercing → upsetting → annealing → pickling → oiling (copper plating) → multi-pass cold drawing (cold rolling) → tube blank → heat treatment → straightening → hydrostatic test (flaw detection) → marking → warehousing.

The rolling method of cold-drawn (rolled) seamless steel pipe is more complicated than hot-rolled (extruded) seamless steel pipe. The first three steps of their production process are basically the same. The difference begins with the fourth step. After the round tube blank is hollowed out, upsetting annealing should be carried out. After annealing, use special acidic liquid for pickling. After pickling, coat with oil. Followed by multi-pass cold drawing (cold rolling) and re-blank tube, as well as special heat treatment. It will straighten after heat treatment. The straightened steel pipe is sent to a metal flaw detector (or hydrostatic test) by a conveyor belt for internal flaw detection. If there are cracks and bubbles in the steel pipe, they will be detected. After the quality inspection, steel pipes have to undergo strict manual selection. After quality inspection, steel pipes should be painted with number, specification and production batch number. And hoisted into the warehouse with a crane.