Material	TP 304, 304H, 304L, 304LN, 316, 316H, 316L, 316LN, 316Ti, 309, 310, 317L, 321, 347, 409, 410, 420, 430, 446, 202 Etc.
Standard	ASTM A - 270, 249, 312, 269, 213, 268, 358
Construction	ERW - EFW - EFSW
Schedule	S 5, S 10, S 20, S 40, S 60, S XS, S 80, S 100, S 120, S 140, S 160, S XXS
Pipe Type	Beveled End (BW), Plain End Pipe (PE)

Technical Data

S.S Schedule Piping to ASTM A-312 (ERW)

Introduction & Scope

This covers straight seam welded (without the addition of filler metal) authentic stainless steel pipe intended for high temperature and general corrosive service.

Material

Material is ordered to comply with the requirement of ASTM A-240 in 304, 304L, 316 and 316L grades regularly. Special grades can be made as per Customer's requirements

Size Range
OD : ½" NPS (21.3 mm) to 8" NPS (219.1 mm)
Thick : NB size in schedule 5 10 S & 40S
Length : As per Customers Requirement.

Process of Manufactures

The pipe is manufactured from annealed strips on modern continuous forming mills with TIG welding process under inert gas atmosphere. All pipes are annealed at a minimum temperature of 1040°C, straightened, pickled and passivated, end finished & 100% tested in accordance with ASTM A-530

Tolerances

OD	Size Range	Over mm	Under mm
	Upto 1" NB	0.40	0.79
	Over 1" NB to 4" NB	0.79	0.79
	Over 4" NB to 8" NB	1.57	0.79
Thickness : ± 12.5 of nominal wall thickness		Length : 0/+ 6 mm

Test
Normal : Tensile strength / Yield strength / Elongation, Flattening, Hydrostatic Pressure
Optional : Pneumatic / Air leakage, Eddy current, IG Corrosion.

Standard Weight Chart

Outside Dia		SCH 5		SCH 10 S		SCH 40 S
NB Inch	mm
		Thick	Kg/Mtr.	Thick	Kg/Mtr.	Thick	Kg/Mtr.
½"	21.3	1.65	0.81	2.11	1.01	2.77	1.29
¾"	26.7	1.65	1.03	2.11	1.30	2.87	1.71
1"	33.4	1.65	1.31	2.77	2.12	3.38	2.54
1 ¼"	42.2	1.65	1.93	2.77	3.15	3.68	4.11
1 ½"	48.3	1.65	1.93	2.77	3.15	3.68	4.11
2"	60.3	1.65	2.42	2.77	3.98	0.481	0.531
1"	25.40	2.11	3.74	3.05	5.34	5.16	8.76
3"	88.9	2.11	4.58	3.05	6.54	5.49	11.45
3 ½"	101.6	2.11	5.25	3.05	7.52	5.74	13.77
4"	114.3	2.11	5.25	3.05	7.52	5.74	13.77
5"	141.3	2.77	9.50	3.40	11.74	6.55	22.10
6"	168.3	2.77	11.47	3.40	14.04	7.11	28.68
8"	219.1	2.77	14.99	3.76	20.25	8.18	43.16

Technical Data
S.S Fusion Welded Pipe from Plates as per ASTM A -358
Introduction & Scope

This covers electric - fusion welded authentic Chromium-nickel stainless steel pipe suitable for corrosive or high temperature service, or both. Five classes of pipe are covered under this specification.

Introduction & Scope

Class 1 : Double side welded using filler Material and 100% radiography
Class 2: Double side welded using filler Material. No radiography required
Class 3 : Single side welded using filler Material and 100% radiographed.
Class 4: As class 3, Accept root pass may be made without filler
Class 5: Double welded using filler Material and spot radiographed

Material

This specification covers nineteen grades of Material steel. The plate material comply with there requirements of ASTM A-240. Most commonly manufactured grades are 304, 304L, 304H, 316L 310

Size Range
OD : 10" NPS (273.05 mm) to 24" NPS (609.6 mm)
Thick : NB Size in Schedule 5, 10S, 10 and 40 S
Length : As per customer specification
Process of Manufactures

The pipes are manufactured from leveled plates which are edge beveled and progressively "O" formed on hydraulic presses. The edges of he pipe are either manually TIG welded or continuously welded on Track and Boom. Weld portion is radiographed as per requirement. Annealing of pipe is carried our on continuous furnace. Pipe is further straightened, sized, end finished, pressure tested, pickled and passivated, marked and packed.

Tolerances
OD : + ± 0.5% of specified diameter based on circumferential measurement.
Thick : Minimum thickness at any point not more than 0.3 mm under nominal thi
Out of Roundness : difference between maximum and minimum OD 1%
Straightness : 3 mm in 3 mtrs
Length : As per customer specification
Test

Transverse bend weld tests
Transverse tension test to ASME code IX para QW 150.
Hydrostatic Test ASTM A-530
Radiographic classed 1,3 to ASMIE Code VII para UW 51, Class 5 to ASME Sec. VII para UW 52

Outside Dia		SCH 5		SCH 10 S		SCH 40
NB Inch	mm
		Thick	Kg/Mtr.	Thick	Kg/Mtr.	Thick	Kg/Mtr.
8"	219.08	277	14.99	3.76	20.250	8.18	43.16
10"	273.05	3.40	22.97	4.19	28.200	9.27	61.20
12"	323.85	3.96	31.72	4.57	36.530	9.53	74.92
14"	355.60	3.96	34.87	4.78	41.973	9.53	82.55
16"	406.40	4.19	42.18	4.78	48.051	9.53	94.66
18"	457.20	4.19	47.15	4.78	54.129	9.53	106.78
20"	508.00	4.77	60.13	5.54	69.674	9.53	118.90

Grade	Tensile Strength min. Ks(Mpa)	Yield Point Ksi (Mpa)	Elongation % (G.L.: 2 in ro 50 mm				Hardness Text Max
			Full Section specimen	Strip Specimen t<6/16in t<5/16in		Round Specimen	Brinell	Rockwell
304	75(515)	30(205)	35	35	56t+17.50	28	192	B 90
304L	70(485)	25(170)	35	35	56t+17.50	28	192	B 90
304 H	75(515)	30(205)	35	35	56t+17.50	28	192	B 90
316	75(515)	30(305)	35	35	56t+17.50	28	192	B 90
316L	70(485)	25(170)	35	35	56t+17.50	28	192	B 90
316H	75(515)	30(205)	35	35	56t+17.50	28	192	B 90
316 Ti	75(515)	30(205)	35	35	56t+17.50	28	192	B 90
317	75(515)	30(205)	35	35	56t+17.50	28	192	B 90
309	75(515)	30(205)	35	35	56t+17.50	28	192	B 90
310S	75(515)	30(205)	35	35	56t+17.50	28	192	B 90
310H	75(515)	30(205)	35	35	56t+17.50	28	192	B 90
321	75(515)	30(205)	35	35	56t+17.50	28	192	B 90
321 H	75(205)	30(205)	35	35	56t+17.50	28	192	B 90
347	75(515)	30(205)	35	35	56t+17.50	28	192	B 90
347H	75(515)	30(205)	35	35	56t+17.50	28	192	B 90

• Our mission is to supply quality of pipes & tubes at affordable cost to cater the needs of nation.
  
• Our Goal is to emerge as market leader by preserving the confidence of our valued customers.
  
• We shall endeavor to continually improve through group efforts.
• We are committed to develop, implement and maintain an effictive Quality Management System in compliance with ISO 9001:2008 Standard

Quality Assurance Plan

Sr.No.	Process Operation	Quality Characteristics	Method Of Control
1	Raw Material (Strip)	1> Dimensions 2> Chemical analysis 3> Control of Slit which within specified limits  4> Surface	Actual measurement as per Std.  Analysis of all elements as per Std Testing as per various Std. Measurement of width, thickness & recording visual inspection.
2	Tube Mill (GTAW Type)	1> Weld Test, Flare Flanges, Flattering Reverse bend & Reverse Flattening. 2> Inspection of weld, seam 3> Dimensions 4> Surface	Testing as per ASTM specification & recording the result. One test for every 30 to 35 Mtrs. Visual inspection weld zone. O.D. , Thickness & Length. Check roller surface profile& finish.
3	Solutions Annealing (At Min. 1040  C) With continuous water quenching.	1> Temperature 2> Hardness 3> Micrometer	Automatic Relay Temp / Controller Adjusted to present level. Measurement of hardness as per Std. one Test / Lot / Heat
4	Straightening	Straightness OD Surface Finish	Adjust roller setting measure visual
5	Cutting	Square cut Length	Right angle to length, visual
6	Deburing	Burs removel On OD and ID Edges	Visual
7	Chemical Treatment a) Pickling b) Passivation c) Bath	Concentration Concentration Temperature	One Test / Bath Day One Test / Bath Day Temperature
8	Hydrostatic Pressure Test	Test Pressure	100 % Inspection at test pressure specified as per ASTM  Std.
9	Final Inspection	IGC Test Dimensions Surface Physical Testing Grade Check Product Analysis	As per standard 100 % inspection of Dimensions as specified. Visual Inspection for surface defects, Physical Testing and Chemical analysis as per ASTM standards.
10	Marketing	Marking as per Std.	Check for proper marking
11	Packing	Seaworphy Packing / Wooden Cart	Check for packing, Quantity, shipping mark,