ASTM A789 A790 Uns S31803 S31803 2205 S32205 2507 S32750 S30432 Duplex Stainless Steel Seamless Pipe

ASTM A789 A790 Uns S31803 S31803 2205 S32205 2507 S32750 S30432 Duplex Grade Stainless Steel Polished Seamless Welded PipeOur company mainly work on stainless steel pipe and tube, plate and sheet, rod and bar,
Material covered with Austenitic stainless steel, Ferritic steel, Nickel, Nickel based alloy, Inconel alloy, Incoloy, Hastelloy, high temperature resist alloy ,tubo de acero sin costura ,бесшовная стальная труба
Type of pipe and tube both in seamless and weld, according to final surface finished they can be classify into A&P(annealing and pickling) finished, BA(bright annealing) finished, EP(electropolishing electrolytic polishing),MP(mechanical polishing)
High-grade roughness for EP electropolishing tube, within 0.4um (micron) for outside/outer surface, within 0.2um (micron) for inside/inner surface
Detail of covered material/Grade
300 series austenitic: 304 304/304L 304H 30432(super 304H)321 321H 316 316L 316/316L 316H 317 317L 317LN 347 347H 310S 310H 310 314 S30815(253MA)
Duplex Grade and super duplex grade: 31803 UNS S31803 32205 2205 UNS S32205 32304 UNS S32304
Super duplex: 2507 32750 UNS S32750 32760 UNS S32760
Super austenitic: AL6XN N08367 N08904 904 904L S31254(254SMO)
Ferritic/Ferrite and Martensitic/Martensite 400 series: 405 410 430 409 439 429 430Ti
Nickel and Nickel alloy series:
Inconel: Inconel 600 N06600 Inconel 601 N06601 Inconel 625 N06625 Inconel 690 N06690
Hastelloy : Hastelloy B3 N10675 Hastelloy C 276 N10276 Hastelloy C 22 N06022 Hastelloy G35 N06035 Hastelloy G30 N06030
Monel: Monel 400 N04400
Incoloy: Incoloy800 N08800 800 Incoloy800H 800H N08811 Incoloy825 825 N08825 N08810 8810 Incoloy718 N07718 GH4169
Aolloy: Alloy 20 N08020 incoloy 20 Alloy 28 N08028 inc oloy 28 Alloy 31 N08031 incoloy 31
Nickel: N02200 Ni200  N02201 Ni 201
seamless steel
pipesteel tube
stainless pipe
round steel
Stainless Steel
Steel Pipe
Steel Coil 
Stainless Steel Pipe
Stainless Steel Plate

ASTM A790 ASME SA790 S31803 S32205 S32101 S32750 S32760 S32304 S31500 S31260 Seamless Pipe Main Testing Terms and Procedure:

• 1. Heat Treatment and Solution Annealing / Bright Annealing

• 2. Cutting to required length and deburring;

• 3. Chemical Composition Analysis Test With 100% PMI and One tube from each heat by Direct Reading Spectrometer

• 4. Visual Test and Endoscope Test for Surface Quality Test

• 5. 100% Hydrostatic Test and 100% Eddy Current Test

• 6. Ultrasonic Test subject to the MPS (Material Purchase Specification)

• 7. Mechanical Tests includes Tension Test, Flattening Test, Flaring Test, Hardness Test

• 8. Impact Test subject to Standard request

• 9. Grain Size Test and Intergranular Corrosion Test

• 10. Ultrasoic measuring of Wall Thickness

product purpose:
Stainless steel pipe is a kind of hollow long round steel and economical cross-section steel, which is widely used in life decoration and industry ,building material,food processing, storage and transportation,Plate heat exchangers, bellows, household products , auto parts , medical appliances, building materials, chemicals, food industry, agriculture, ship parts, industrial transmission pipelines and mechanical structural parts such as petroleum, chemical, medical, food, light industry, mechanical instruments,manufacture mechanical parts, engineering structures etc.
Duplex steel and super duplex steel is the most widely used chromium-nickel stainless steel.It has good corrosion resistance, heat resistance, low temperature strength and mechanical properties;Stainless steel 304 is suitable for indoor and outdoor decoration, building components, stair support Hands and railings, chemical equipment, oil pipelines and storage tanks, food processing equipment, kitchenware and medical instruments, automotive parts, aircraft structures and aerospace components, electronic equipment, power engineering, textiles,Industrial and Marine engineering