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:
Origin: China
Brand: Gangyu
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
Specification: 114.3 * 73.0
Payment and shipment:
Minimum order quantity: 1 piece
Price: negotiation
Packing: pallet or wooden box
Delivery time: 10 working days after receiving payment
Payment: T / T, L / C, Xilian, Yiwu account
Supply capacity: 50000 pieces per month
Product Name: carbon steel reducing elbow
Shape: round, material: carbon steel 20#
Angle: 30, 45, 60, 90, 135180 standard: ASME / GB / en / JIS / is
Size: 21-1220thickness: sch10-sch160
Description:
1. Elbow: long radius 90 degrees, 45 degrees, 180 degrees; short radius 90 degrees, 45 degrees, 180 degrees
It can be made according to the drawings provided by customers
2. scope:
Seamless pipe fittings: 18-1020
Weld pipe fittings: 2-74 "
3. Thickness grade
SCH10,SCH20,SCH30,SCH40,STD,SCH60,SCH80,XS,SCH100,SCH120,
SCH140,SCH160,XXS. SGP, DIN
4. materials
10#，20#，45#，Q345B,12CR1MOV 15CrMo,Cr5MO,L245,L360,L415,L450,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:
Chamfering, flat end, or as required by customer.
6. Surface treatment and packaging
Sandblasting, black or clear paint, wooden case or tray.
Explain:
Nominal diameter, outer diameter, center to end dimension, center to center dimension, back to end dimension
45 ° 90 ° elbow 180 ° elbow 180 ° elbow
Elbow
British metric series a series B series long radius long radius short radius long radius long radius
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 - - - -

Production process of elbow fittings:

Select material (we preferred baosteel, tianjin TPCO, smoke treasure, baotou steel, Chang Bao, CRC steel raw materials, such as requirements within the outer diameter is smooth, uniform wall thickness, selection of high manganese steel pipe to ensure that products beautiful) - material inspection (measurement, chemical composition inspection) - storage - material cutting (leave enough machining allowance, removing iron and burr) - intermediate frequency heater variable diameter and bending forming (mold push every 48 hours after grinding, ensure dimensional tolerance control) - heat treatment (tempering process) - end processing (37.5 + 0.25) bevel Angle - visual inspection (appearance without injury, peeling,Pockmark) - chemical composition analysis (imported hand-held spectrometer) - dimensional inspection (outer diameter, wall thickness, ovality, straightness) - mechanical performance test (squashed, flaring) - sand (fine sand in order to ensure that the surface pitting not too - spray paint (environmental protection coating equipment coating surface evenly) - printing (code printer code on a black, white, bright font) - packing (fixed wooden cases or pallet packaging, packaging tapes, plastic film outside package water-proof, dust) - product check (forklift trucks, lifting transport, light with light, neat)

Quality assurance system:

1. Passed SGS international certification.

2. International ERP production management system, providing secondary manual quality inspection to ensure 100% of product qualification

3. Annual production capacity of 20,000 tons of pipe fittings.

Inventory workshop of 4.7000 square meters, 200 employees

5.300 square meters sample room, independent research and development capacity, ODM to provide customized.

6. Simple cooperation, convenient service and fast logistics.

7.6 years export experience.Provide a complete set of services including painting, marking, packaging, trailer, customs clearance, port and shipping.