Reliable Pipes & Tubes Ltd. started its manufacturing unit a decade ago for STAINLESS STEEL ERW PIPES & TUBES with production range from 1/4" NB to 8"NB manufactured on continues fully automated tube mills of TIG welding without any addition of filler metal (A 312) & are in close contact with the manufacturer having the manufacturing facility from 10" NB to 24" NB with the addition of filler wire.(A 358).

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	Beweld End (BW), Plain End Pipe (PE)

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 1050°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

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

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