Production Process

Production Process of Stainless Steel Seamless Pipe

Process Control
A: Self-inspection & Intercross Check
B: Pre-inspection for semi-finished Pipes
C: Mechanical Test after heat treatment
D: Auto Controlled Heat Treatment Furnace-stable & Pollution-prevented

Raw Material: Bars	Chemical-Analysis	Peeled&Cutting

Inspection	Hot-Piercing	Heating

Cold-Pilgering	Cold Drawning	Solution-Annealed

Pickling	Pipe For Inspection	Straightening

Final Cutting	Quality Control A: Raw Material: Pipe billet after Hot Piercing B: Inspection: Chemical Composition; Dimension Measurement; Outer & Inside Surface Vision

Spectrograph Testing	Surface Inspection	Inside Inspection	OD Meansurement

WT Measurement	Length Measurement	Hydrostatic Testing	Ultrosonic Testing

Eddycurrent Testing	Intergranularcorrosion	Metallographic Testing	Hardness Testing

Mechanical Property	Chemical Analysis	Printing Marks	Bundle Packing

Wooden Packing	Loading

Inspection for Finished Products
A: Dimension Measurement
B: Outer & Inner Surface Inspection
C: Chemical Composition: Chemical Analysis; Portable Spectrometer

D: Mechanical Properties: Flattening, Flaring, Hardness; Tensile Strength
E: Non-destructive Test: Eddy Current Test; Ultrasonic Testing;
F: Corrosion Test: Intergranular Corrosion Test; Pit Corrosion Test
G: Hydrostatic Test
H: Grain Size Test

Equipment Gallery
Environment

MATERIAL REFERENCE LIST
MATERIAL	PIPES	WROUGHT FITTINGS	FORGING	PLATE	CASTING	TRADE NAME
Stainless steel&Super Stainless	A312 TP304	A403 WP304	A182 F304	A240 gr. 304	A351 CF8	304
	A312 TP304L	A403 WP304L	A182 F304L	A240 gr. 304L	A351 CF3	304L
	A312 TP310S	A403 WP310S	A182 F310S	A240 gr. 310S	A351 CK20	310
	A312 TP316	A403 WP316	A182 F316	A240 gr. 316	A351 CF8M	316
	A312 TP316L	A403 WP316L	A182 F316L	A240 gr. 316L	A351 CF3M	316L
	A312 TP316Ti	A403 WP316Ti	A182 F316Ti	A240 gr. 316Ti		316Ti
	A312 TP317L	A403 WP317L	A182 F317L	A240 gr. 317L	A351 CG8M	317
	A312 TP321	A403 WP321	A182 F321	A240 gr. 321		321
	A312 TP347	A403 WP347	A182 F347	A240 gr. 347	A351 CF8C	347
	A312 S31254	A403 S31254	A182 F44	A240 S31254	A351 CK3MCuN	254 SMO
Duplex steel	A790 S31803	A815 S31803	A182 F51	A240 S31803	A890 Gr.4A	SAF2205
	A790 S32304	A815 S32304		A240 S33304		SAF2304
	A790 S32750	A815 S32750	A182 F53	A240 S32750	A890 Gr 5A	SAF2507
	A790 S32760	A815 S32760	A182 F55	A240 S32760	A890 Gr 6A
Special alloy	B677/674 N08904	B366 WP904L	B459 N08904	B649 N08904		904L
	B729/464 N08020	B366 WP20CB	B462 N08020	B463 N08020	A351 CN7M	Alloy 20
	B161 N02200	B366 WPN	B564 N02200	B162 N02208		Nickel 200
	B161 N02201	B366 WPNL	B160 N02201	B162 N02201		Nickel 201
	B165 N04400	B366 WPNC	B564 N04400	B127 N04400	A494 M35-1	Monel 400
	B407 N08800	B366 WPNIC	B564 N08800	B409 N08800		Incoly 800
	B423 N08825	B366 WPNICMC	B564 N08825	B424 N08825	A494 CU5MCuC	Incoly 825
	B167 N06600	B366 WPNCI	B564 N06600	B168 N06600	A494 CY40	Inconel 600
	B444 N06625	B366 WPNCMC	B564 N06625	B443 N06625	A494 CW6MC	Inconel 625
	B622 N10276	B366 WPHC276	B564 N10276	B575 N10276		Hastelloy C276
	B622 N06455	B366 WPHC4	B564 N06455	B575 N06455	A494 CW2M	Hastelloy C4
	B622 N06022	B366 WPHC22	B564 N06022	B575 N06022	A494 CX2MW	Hastelloy C22
	B622 N10665	B366 WPN\HB-2	B564 N10665	B333 N10665	A494 N7M	Hastelloy B2
Carbon steel	A106 Gr.B	S234 WPB	A105/N	A515 Gr65	A216 WCB
Low temp. service	A333 Gr.3	A420 WPL3	A350 LF3	A516 Gr.70	A352 gr. LC3
Low temp. service	A333 Gr.6	A420 WPL6	A350 LF2	A516 Gr.65	A352 gr. LCB
High temp. service (Chrome-Moly Alloy)	A335 P1	A234 WP1	A182 F1	A204 gr B	A217 gr.B
	A335 P5	A234 WP5	A182 F5	A387 gr.5	A217 gr. C5
	A335 P9	A234 WP9	A182 F9	A387 gr.9	A217 gr.C12
	A335 P11	A234 WP11	A 182 F11	A387 gr.11	A217 gr.WC6
	A335 P22	A234 WP22	A182 F22	A387 gr.22	A217 gr.WC9
	A335 P91	A234 WP91	A182 F91	A387 gr.91	A217 gr.WC12
Line pipe material (High Yield)	API 5L B	A234 WPB	A105/N
	API 5L X42	A860 WPHY42	A694 F42
	API 5L X46	A860 WPHY46	A694 F46
	API 5L X52	A860 WPHY52	A694 F52
	API 5L X60	A860 WPHY60	A694 F60
	API 5L X65	A860 WPHY65	A694 F65
	API 5L X70	A860 WPH70	A694 F70

Comments:

1–The list is for reference only. Pls make a final confirming before order.

2–If your material is not in this list, pls contact Yaang without any hesitate.

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Production Process

Production Process