Production Process:

• Material Selection: We primarily source raw materials from leading steel mills such as Baosteel, TPCO, Yanbao, Baotou Steel, Changbao, and Huarun. We select tubes with smooth internal/external surfaces, uniform wall thickness, and a preference for higher manganese content to ensure a superior final appearance.

• Material Inspection: Incoming materials undergo dimensional checks and chemical composition analysis.

• Warehousing: Approved materials are stored in inventory.

• Cutting: Tubes are cut to length with sufficient machining allowance. Burrs and metal chips are removed.

• Bending & Forming: Tubes are heated using medium-frequency induction heaters and formed via pushing with precision dies. Dies are re-polished every 48 hours of operation to maintain strict dimensional tolerances.

• Heat Treatment: Stress relief annealing (tempering) is performed.

• End Machining: Bevels are cut on 90-degree CNC lathes to an angle of 37.5° ± 0.25°. The land (flat edge at the end of the bevel) is sized according to the pipe diameter. The land ensures a flush fit for butt welding and prevents burn-through during the TIG root pass.

• Visual Inspection: Surfaces are checked for defects like scratches, peeling, or pitting.

• Chemical Analysis: Composition is verified using imported handheld spectrometers.

• Dimensional Inspection: Checks include outside diameter, wall thickness, ovality, and straightness.

• Mechanical Testing: Tests include flattening and flaring to validate performance.

• Sandblasting: A fine grit is used to create a uniform surface finish without excessive pitting.

• Painting: Surfaces are evenly coated using environmentally friendly spray equipment.

• Marking: Legible black background with white lettering is applied using a marking machine.

• Packaging: Products are packed in wooden cases or on pallets, secured with steel strapping, and wrapped in plastic film for weather and dust protection.

• Shipping: Careful handling using forklifts and overhead cranes ensures secure and orderly loading for transport.

Quality Assurance & Company Profile:

1. Certifications: ISO 9001 Quality Management System, Environmental Management System, Occupational Health & Safety Assessment Series, AAA Credit Rating, and SGS International Certification.

2. Quality Control: An integrated international ERP system manages production, supplemented by a secondary manual quality inspection to guarantee a 100% pass rate.

3. Production Capacity: Annual output of 20,000 tons of pipe fittings.

4. Facilities & Workforce: 7,000 sqm storage warehouse and a team of 200 employees.

5. R&D & Customization: A 300 sqm sample room supports our in-house R&D and ODM/ custom manufacturing capabilities.

6. Service: We offer straightforward cooperation, responsive service, and efficient logistics.

7. Experience: A decade of expertise in international export.

Product Details:
Place of Origin:China 
Brand Name:Gangyu Pipeline 
Certification:MTC/COC/ISO/CE SGS
Standard
ASME B16.9-2007
ASME B16.25-2007
ASME B16.5-2007
EN10253-1-1999 EN10253-2-2007 EN10253-3-2008 EN10253-4-2008
DIN2605-1-1992 DIN2605-2-1995
JIS B2311-2009 JIS B2312-2009 JIS B2313-2009
GB/T12459-2005 GB/T13401-2005 GB/T10752-2005
Model Number:3"  SCH40S 
Payment & Shipping Terms:
Minimum Order Quantity:1pc 
Price:negotiation 
Packaging Details:Packed in wooden pallet 
Delivery Time:10 working days after received your payment 
Payment Terms:T/T, LC, western Union 
Supply Ability:50,000pcs per month 
 Product Name:Carbon Steel Elbow Connection:Butt Welding 
Shape:Round Material:Carbon Steel 
Degree:30, 45, 60,90, 135,180 Standard:ASME/GB/EN/JIS/IS 
Size:1/2-72inch Wall Thickness:Sch10-sch160 


Seamless Carbon Steel Tube Elbows , Butt Weld Steel 90 Degree Elbow
Description:
1. Elbow: Long Radius 90 Deg, 45 Deg,180 Deg ; Short Radius 90 Deg, 45Deg,180 Deg
    Our Butt Weld Pipe Fittings can supply as clients draft drawing.
2. Size Range
    Seamless Fittings : 1/2inch to 24 inch
    Weld Fittings: 2 inch  to 72 inch
3. Wall Thickness
    SCH10,SCH20,SCH30,SCH40,STD,SCH60,SCH80,XS,SCH100,SCH120,
    SCH140,SCH160,XXS. SGP, DIN
4. Material
A234 WPB , C, A420 WPL6, WPL3,WPL8,WPL9; A234 WP1, WP265GH ,WP12. WP5, WP9, WP91,WP911, A403 WP304 ,WP304L, A403 WP316, WP316L; A420 WP3, WP6; A860 WPHY 42, WPHY 52, WPHY 60, WPHY 65, WPHY 70; st37.0,st35.8; SUS304, SUS304L,SUS316,SUS316L.
5. End Treatment
    Bevel Ends , Plain Ends , or as per Clients Requirments
6. Surface Treatment and Packing
    Sand Blast, Paint Black Lacquer or Transparent Oil .
    Wooden Case or Wooden Pallet or as per customers' requirements.
Specifications:
nominal diameter outside diameter center to end center to center back to face 
45° 90° elbow 180° elbow 180° elbow 
elbow 
NPS DN A series B series long redius long redius short redius long redius short redius long redius short redius 




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• nominal diameter		outside diameter		center to end			center to center		back to face
  				45°	90° elbow		180° elbow		180° elbow
  				elbow
  NPS	DN	A series	B series	long redius	long redius	short redius	long redius	short redius	long redius	short redius
  1/2	15	21.3	18	16	38	-	76	-	48	-
  3/4	20	26.9	25	16	38	-	76	-	51	-
  1	25	33.7	32	16	38	25	76	51	56	41
  1 1/4	32	42.4	38	20	48	32	95	64	70	52
  1 1/2	40	48.3	45	24	57	38	114	76	83	62
  2	50	60.3	57	32	76	51	152	102	106	81
  2 1/2	65	76.1(73)	76	40	95	61	191	127	132	100
  3	80	88.9	88	47	114	76	229	152	159	121
  3 1/2	90	101.6	-	55	133	89	267	178	184	140
  4	100	114.3	108	63	152	102	305	203	210	159
  5	125	139.7	133	79	190	127	381	254	262	197
  6	150	168.3	159	95	229	152	457	305	313	273
  8	200	219.1	219	126	305	203	610	406	414	313
  10	250	273	273	158	381	254	762	508	518	391
  12	300	323.9	325	189	457	305	914	610	619	467
  14	350	355.6	377	221	533	356	1067	711	711	533
  16	400	406.4	426	253	610	406	1219	813	813	610
  18	450	457	478	284	686	457	1372	914	914	686
  20	500	508	529	316	762	508	1524	1016	1016	762
  24	600	610	630	379	914	610	-	-	-	-
  28	700	711	720	442	1067	711	-	-	-	-
  32	800	813	820	505	1219	813	-	-	-	-
  36	900	914	920	568	1372	914	-	-	-	-
  40	1000	1016	1020	631	1524	1016	-	-	-	-
  44	1100	1118	1120	694	1676	1118	-	-	-	-
  48	1200	1219	1220	758	1829	1219	-	-	-	-
  52	1300	1320.8	1320	825	1981	1320	-	-	-	-
  56	1400	1422.4	1420	888	2134	1420	-	-	-	-